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Patent 1176557 Summary

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Claims and Abstract availability

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(12) Patent: (11) CA 1176557
(21) Application Number: 377395
(54) English Title: CUTTING HEAD
(54) French Title: TETE DE COUPE
Status: Expired
Bibliographic Data
(52) Canadian Patent Classification (CPC):
  • 164/135
(51) International Patent Classification (IPC):
  • B26D 5/00 (2006.01)
  • B26D 7/00 (2006.01)
(72) Inventors :
  • HENDRIXSON, ROBERT A. (United States of America)
(73) Owners :
  • X LTD. (Not Available)
(71) Applicants :
(74) Agent: BORDEN LADNER GERVAIS LLP
(74) Associate agent:
(45) Issued: 1984-10-23
(22) Filed Date: 1981-05-12
Availability of licence: N/A
(25) Language of filing: English

Patent Cooperation Treaty (PCT): No

(30) Application Priority Data:
Application No. Country/Territory Date
149,105 United States of America 1980-05-12

Abstracts

English Abstract


ABSTRACT
The cutting head invention relates to devices employed
for cutting mat boards. Mounting and control of the cutting
blade to consistently provide a clean, straight cut of the
mat board is achieved by a cutting head having backing
and cover plates and a locking and adjustment
assembly. A top screw, rear depth adjustment screw
and bottom flange secure the cutting blade, deform-
ing edges thereof.


Claims

Note: Claims are shown in the official language in which they were submitted.



THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A cutting head for bearing a cutting blade in a mat
board cutter, said cutting head comprising;
first securement means for engaging an edge of the
blade;
second securement means for engaging a second edge
of the blade;
third securement means for engaging a third edge of
the blade;
said first and second securement means deforming the
blade edges.

2. A cutting head, for bearing a blade in a mat board
cutter, the blade having a capless edge, a cutting edge, and
transverse edges extending therebetween, the cutter including a
block borne by a guide, said cutting head comprising:
mounting plate means attached to the block;
cover plate means attached to said mounting plate
means, the blade being positionable between said mounting and
cover plates means; and
securement means, for engaging edges of the blade,
attached to said plate means and including first securement means
for engaging the capless edge, second securement means for
engaging the cutting edge, and third securement means for
engaging a transverse edge, said first and second securement
means deforming the capless and cutting edges.

3. The cutting head of claim 2 and further wherein
said first means includes a flange attached to one of said plate
means, the cutting edge resting upon said flange when the blade
is disposed between said cover and mounting plate means.

4. The cutting head of claim 2 and further wherein
said second means includes a locking member attached to one of
said plate means and adjustably movable against the capless edge

11


when the blade is disposed between said cover and mounting plate
means.

5. The cutting head of claims 2, 3 or 4 and further
wherein movement of said second means toward said first means
causes deformation of the capless and cutting edges.

6. The cutting head of claim 2 and further wherein said
mounting and cover plates form a space therebetween , the blade
being receivable within said space, said third means including a
depth adjustment member attached to one of said plate means and
movable a variable distance into said space.

7. The cutting head of claim 2, the blade being
characterized in that the capless edge has at least one notch
formed therein.

8. The cutting head of claim 7 and further wherein at
least one notch is formed by cutting into both the capless edge
and a transverse edge, said notch including edge means for
positioning, and indicating position of, the blade.

9. The cutting head of claim 8 and further wherein said
cover plate means includes first window means formed therethrough
and operable with said edge means to indicate position of the
blade.

10. The cutting head of claim 8 and further wherein one
of said plate means includes an interior projection engageable by
said edge means to position the blade.

11. The cutting head of claim 2 and further including
means for monitoring blade positioning formed in said cover plate
means, said means for monitoring including window means formed
through said cover plate means, movement of said third means being
viewable through said window means.

12



12. The cutting head of claim 11 and further wherein
said means for monitoring includes a notch cut into one end of
said cover plate means disposed away from said window means, one
transverse edge being viewable in said notch and the other
transverse edge being viewable through said window means when the
blade is received between said plate means.


13. The cutting head of claim 2, the block including a
projection, and further wherein said mounting plate means includes
stop pocket means for engaging the projection.


14. The cutting head of claim 13 and further wherein
said stop pocket means includes a pocket formed into said mounting
plate means and a stop member attached to said mounting plate
means and movable a variable distance into said pocket.


15. The cutting head of claim 2 and further including
attached to said cover plate means a slide means for loading,
moving, and withdrawing the blade between said cover and mounting
plate means.


16. The cutting head of claim 15 and further wherein
said mounting plate means has a channel area formed therein and
said cover plate means has a raised portion, said channel and
raised portion forming a space therebetween for receiving the
blade, said slide means including an elongated slot cut through
said cover plate means, through said raised portion, and including
blade-engaging means movable along said slot.


17. The cutting head of claim 2 and further wherein said
mounting and cover plate means have forward end surfaces through
which the blade is received, bottom, top and rear surfaces
adjacent which said first, second and third securement means
respectively are located, upper forward and lower rear knobs
connecting said plate means and projecting away from said cover
plate means, and a lower control surface depending from said cover
plate means' bottom surface below said lower rear knob.




13


18. The cutting head of claim 17 and further wherein
said lower rear knob includes a crank, said mounting plate means
includes a pivot attachment to the block and a break means, said
lower rear knob being movable to engage said break means and move
said break means into said pivot attachment whereby said mounting
plate means is locked against movement with respect to the block.

19. The cutting head of claim 17 and further wherein a
return spring extends between the block and said plate means'
rear surfaces adjacent said top surfaces, the cutting edge being
disposed parallel to said top surfaces, said plate means being
held in a rest position disposing said top surfaces and the
cutting edge parallel to the guide and the mat board.

20. A cutting head for bearing a cutting blade in a mat
board cutter, said cutting head comprising:
a blade including a body member, a cutting edge
formed on said body member, a second edge formed on said body
member away from said cutting edge, third edges formed on said
body member and connecting said cutting and second edges, at
least one notch cut into said second edge, and at least one of
said notches formed by cutting into both said second edge and one
of said third edges and including edge means for positioning, and
indicating position of, said blade in the cutting head;
first securement means for engaging said cutting
edge;
second securement means for engaging said second
edge;
third securement means for engaging one of said
third edges; and
said first and second securement means deforming
said cutting and second edges.

14

Description

Note: Descriptions are shown in the official language in which they were submitted.


`~ ~
1 1~6557


.

CUTTING }I~AD
.~
j Technical Pield
I This invention relates generally to devices
" S which are employed for cutting mat boards. More parti-
cularly, the invention relates to structur~s in matboard
~ cutters which structures are employed to hold and posi-
;~, tion the cutting blade.
~ '
Background Art
,. .
Mat boards are generally formed from paper stock.
Commonly mat boards are employed with frames for paintin~s,
photographs and the like after having had apertures of ap-
; propriate size and shape cut therein. A number of devices
have been developed for cutting mat boards, U.S. Patent
. Nos. 3,996,827 and 4,158,977 to Logan and U.S. Patent No~
- 3,213,736 to Keeton showing examples of such devices.
` Control of the cutting blade has been a continu-
; ing problem from the beginning of the art. A clean,
straight cut, whether perpendicular, or at an angle, to the
surface of the mat board has always been desired. The
devices developed to date still do not achieve such cuts
with a desirable degree of constancy, and much skill is
still required to properly operate such devices to produce
the desired cut.
The devices which have been developed generally
are complex and require cutting blades having special con-
figurations or having a capped edge. Furthermore, the
devices generally seaure the blade from the side. The
blades tend to waver from side to side and up and down and
much skill is required to obtain a straight cut. Further-
more, the setting o the capped blades in particular con~
stantly must be adjusted because such blades are difficult
to securely clamp into a particular position and the caps


- ~ .

1 176557
necessitate readjustment whenever ends of the blades are
changed in the device. Also, capped b1ades and blades
of special configuration have become increa~in(~ difficult
to find in sufficient quantities of proper (lu.llity and
reasonable price.
.~ .
- Disclosure of Invention
The cutting head of this invention (Jellerally in-
cludes backing and cover plates and adjustment mechanisms.
The backing plate is attached to a standard block.
A blade-receiving channel is formed into the bac~ing plate;
a locking screw threads into the top of the backing plate;
and a depth adjustment screw threads into the rear of the
backing plate.
The cover plate is attached to the backing plate
by hand engageable knob~. A slide mechani~m for^ loading
and moving a blade travelc~ in a slot formed through the
cover plate. A window is formed in the cover plate adja-
cent the depth adjustment screw.
It is an object of this invention to provide a
cutting head of superior efficiency and accuracy which can
be mounted upon the blocks of standard mat board c~ltting
devices.
Another object of this invention is to provide a
cutting head which employs razor blades of both common and
improved constructions.
It is also an object of this invention to provide
a cutting head which grasps and holds a blade in a more
secure fashion and also in moreexactly positioned fashion
with respect to the cut surface, thereby increasing cutting
accuracy.
Yet another object of this invention is the pro-
vision of a cutting head employing an improved manner of
loading, moviny and adjusting the cutting blade.
Also an object is the provision of a cutting head
having improved access to the cutting blade thereby facili-
tating monitoring of the position of the blade and lubrica-
tion and other maintenance of the cutting head.
A further object of this invention is the provision
~f a cuttin~ head wherein the blade is held in such positions

3 ~ 6 ~
and such access to the blade is provided that handling of
the blade is minimized thereby providing for illcreased
safety of operation.
These ob~ects and other features and a~vantages
o~ this cutting head invention will become readily apparent
upon referring to the following description in conjunction
with the appended drawing.

Brief Description of the Drawings
The cutting head invention is illustrated in the
drawings wherein:
Fig. 1 is a perspective view showin(J ~m)loyment
of the invention;
- Fig. 2 is an enlarged, exploded front elevational
view of the cutting head;
Fig. 3 is an enlarged, exploded rear elevational
v~ew of the cutting head backing and cover plates;
Fig. 4 is an enlarged, exploded top plan view of
the cutting head backing and cover plates;
Fig. 5 is an enlarged, exploded bottom plan view
of the cutting head backing and cover plates;
Fig. 6 is an enlarged, upside down, side elevation-
a~ view of the rear, mounting side of the backing plate;
~ Fig. 7 is an enlarged, side elevational view of
the front side of the back plate attached to the block;
F'ig. 8 is an enlarged, upside down, side elevation-
al view of the inner s ide of the cover plate;
E`ig. 9 is an enlarged, side elevational view of the
outer side of the cover plate;
Fig. lU is an enlarged, fragmentary cross-section
taken along line 10-10 in Fig. 3 showing portions of the
adjustmen~ assembly;
Fig. 11 is an enlarged, fragmentary side elevation-
al view similar to Fig. 7 but showing modified blade and
backing plate structure; and
Fig. 12 is an enlarged, fragmentary top plan view,
portions thereof being shown in section taken along line
12-12 in Fig. 7, ~ut showing a modified lockingstructure.

Best Mode forCarrying Out the Invention
The cutting head of this invention is shown

~ 4 1176557
generally at 11 in Fig. 1 of the drawings. The cutting
head 11 is generally employed mounted upon a ~lock 12 in
a mat board cutting device. The block 12 i9 sl i~ably dis-
posed upon an elongated guide rod 13 above a cutter bar 14,
the rod 13 and har 14 being carried by supporting structures
15. The supports 15 are pivotally attached to a work table
16 upon which is disposed a piece of mat board 17 or the like
to be cut. The block 12 typically will have one mounting
surface disposed normal, and one mounting surface disposed at
an angle, to the table 16 surface and will carry a cutting
head disposed a~ainst each of the moullting suraces.
The cutting head of this invention 11 more parti-
cularly includes a backing plate 18, a cover plate 19 and a
locking and adjustment assembly 21. Only one cutting head
11 has been illustrated herein, but it should be understood
that the second cutting head 11 borne by block 12 is a mirror
i~age thereof, although the knob 61 may be attached instead
to the top surface 42c, as shown in Fig. 1.
The backing plate 18 is most clearly illustrated
in Figs. 6 and 7 and includes a longitudinally elongated
plate member 22 having front, rear, top and bottom edges
22a, 22b, 23c, 22d. The plate 22 includes a mounting surface
2~ and a blade-receiving surface 24. The edge 22a includes
a beveled edge area 26. A longitudinal channel 27 is cut
into the surface 24, extending from the edge area 26 most of
the way toward the rear edge 22b.
The channel 27 forms a bottom flange 28 normal to
the surfaces 23, 24 and flush with edge 22d. A clearance
slot 29 is cut along the long axis of the channel 27. Toward
the rear 22b, a bore is cut from the channel 27 through the
- plate 22 wherein is disposed the attachment structure 30
pivotally connecting the plate 22 to the block 12 bearing
5~rface.
A bore 31 (see also Fig. 4) extends from the top
35 edge 22c of plate 22 to the channel 27, having an axis normal
to the longitudinal axes of plate 22 and channel 27 and di-
rected toward the flange 28. A bore 32 (see also Fig. 3)
extends from the lower rear edge 22d to the channel 27 and
communicates with a threaded groove 33 cut into the channel
40 2~ surface. The axes of bore 32 and groove 33 are aligned
and are parallel with the long axis of channel 27. Front,
.

~ 5 - ~176S57
upper rear and lower r~ar attachment bores 34, 36, 37 are
formed into the surface 24. A return sprincl ll()re 38 is
formed into the u~per rear edge 22b.
Astop pocket 39 (see also Fig. 2) i; (~It into
t~e lower front area of the mounting surface 23. A bore
41, adjacent bore 31 (see also Fig. 4) is cut from the top
- edge 22c to the pocket 39.
The cover plate 19 is most clear~y shown in
Figs. 8 and 3 and also includes a longitudinally elongated
plate member 42 having front, rear, top and bottom edges
42a, 42b, 42c, 42d. The plate 42 has inside alld outside
faces 43, 44. The front edge 42a of the pla~e 42 includes
a lower chamfered portion 46 and an intermediately semi-
circular notch portion 47. A flange portion 48 depends
lS from the lower edge 42d, adjacent the rear edge 42b of
plate 42.
A raised portion 49 extends away from the inside
surface 43 (see also Figs. 2 and 3). The portion 49 is
longitudinally elongated, the longitudinal axis thereof
being parallel to the longitudinal axis of plate 42. A
slot 51 is cut through plate 42, through and alon~ the
longitudinal axis of raised portion 49~ A s~loulder 52 is
c~t into portion 49 around the slot 51, a slide pocket being
formed by the slot 51 and shoulder 52~
A longitudinally elongated window 53 is cut
through the plate 42 above the area 48. The longitudinal
axes of the slot 51 and window 53 are parallel. A lower
front bore 54 is formed through plate 42 adjacent the cham-
fered edge area 46. Front, upper rear, and lower rear at-
30 tachment bores 56, 57, 58 are al~o formed through the plate
42.
The plates 18, 19 are joined together with sur-
faces 24, 43 facing each other. The raised portion 49 fits
into the channel 27 (see also Figs. 2 and 3) above the flange
35 28. Attachment bores 34, 36, 37 are aligned with bores 56,
57, 58 respectively. Hand engageable attachment knobs 59,
61 are thxeaded through the aligned bores 34, 56 and 37, 58
respectively. A third attachment screw 62 is threaded
through aligned bores 36, 57. The knobs 59, 61 and screw
40 6~ secure the cover plate 19 to the backing plate 18. The
' .

- 6 - lI7655~

slot 51 and window 53 are disl~osed directly over the clear-
ance slot 29 and groove ~3 respectively. The rclis~d portion
49 fits into the channel 27.
The locking and adjustment assembly ~l includes
aStop locking screw 63 (Fiqs. 11 and 7) thread~(1 into bore
31 and adjustable to project therethrough into the channel
27 a variable distance. A rear depth adjustment screw 64
(Figs. ll and 7) is threadéd through bore 32 into groove 33
and is adjustable to project into channel 27 a variable dis-
tance. A front guide screw 66 (Fic3s. 2 and 9) is threaded
through bore 54 and is adjustable to project a variable dis-
tance beyond inner surface 43.
The assembly 21 also includes a s~ide mechanism
67, shown most clearly in Fig. lO. The mechanism 67 in-
cludes a shaft 68 having an enlarged stop portion 69 formedadjacent one end. The opposite, extended enll of the ~haft
68 is projected through slot 51 prior to assembly of plates
18, l9, the stop 69 resting adjacent shoulder 52. A nylon
slider washer 71 fits over the extended end of shaft 68 ar.d
against outside face 44. A return coil 72 is disposed
around the shaft 68, extending between the washer 71 and a
button 73 fixed at the extended end of the shaft 68, pr~ssed
o~ or held by set screw.
A ~cale 74 is attached to, or formed on, the flange
area 48 adjacent the window 53.
The cutter head ll may be machined from steel
pieces. Also, the cutter head ll may be die cast of zinc
or aluminum, a replaceable flange 28 being removably attached
thereto, as by screws, and formed of hardened steel. The
machining and die casting techniques employed are known to
- those skilled in those particular arts.
A standard case cutting blade, which typically is
c~apless, has a single cutting edge, and has a central aper-
ture, may be employed with the cutting head ll. An improved
blade of this cutting head invention ll is shown at 76 in
Fig. ll. The blade 76 is longitudinally elongated, having
a single cutting edge 76a, a capless edge 76b and a central
aperture 76c. Notches 77 are cut into the ed~e 76b adjacent
each end of the blade 76, and transverse locating edges 78
are formed th~reby. The plate 22 may be modified to include

~ 7 ~ ~76557
an area 79 projectinq into the channel 27 aft:er the channel
27 has been formed into the surface 24. Ad~itionally, the
plate 42 may be ~odified by having an upper window 81 cut
therethrough such that it is positioned over the projectioll
79 when the backing and cover plates 18, 19 are secured to-
ge~her. The scale 74 may be disposed adjacent the window 81.
A modification of the locking and adjustment
assembly 21 is shown in Fig. 12. A crank ~2 is attached to
the rear knob 61, normal to the longitudinal axis of the
knob 61. A longitudinally elongated break pad insert 84a,b
is disposed in a bore formed in plate 22 and extendinq be-
tween bore 37 and the pivot attachment 30 bore.
A return spring 87 extends from the bore 38 to the
block 12 and operates to hold the cutting h~ad 11 in a nor-
mal, rest position. The longitudinal axis of the cuttinghead 11 in rest position is generally parallel to the longi-
tudinal axis of the guide rail 13.
Loading of the blade is accomplished by grasping
the button 73 and sliding the mechanism 67 to the front end
of slot 51. The blade is then grasped and inserted endwise
into the space between the channel 27 surface and the raised
portion 49 surface such that the central aperture 76c is
disposed adjacent the end of shaft 68. Pressure against the
button 73 along the long axis of the shaft 68 causes the
interior end of the shaft 68 to project through aperture 76c
into clearance slot 29. Movement of themechanism 67, with
the button 73 depressed, toward the rear of the slot 51 then
draws the blade into position within the cutting head 11
without the necessity of pushing or other handling of the
blade with the hand. Once the blade is positioned, the button
73 is released, and the coil 72 causes the shaft 68 to with-
draw from slot 29 and aperture 76c into the slide pocket, the
st~op 69 engaging the shoulder 72. Removal of the blade is
effected by reversing the aforementioned steps.
~5 The operating portion of the blade cutting edge
; 76a projects from between,the backing and cover plates 18,
19 in the area adjacent the chamfered portion 46. The extent
of this projection is determined by the distance the adjust-
ment screw 64 is threaded into groove 33, as the blade is
drawn into the cutting head 11 until the blade and edge en-
- gages the screw 64. The adjustment of screw 64 is viewed

- 8 - ~ 17655~

through window 53 and is calihrated by the scale 74. The
cutting depth of the blade is thereby adjusted such that a
cut of a certain depth into a mat 17 or a cut through a mat
17 of a particular thickness can be achieved.
f The blade is secured in the cuttin~ head 11 by
adjusting the top locking screw 63 downwardly into the
channel 27 and against the capless edge 76b of the blade.
The screw 63 forces the blade down against the flange 28,
and the top and cutting edges 76b, 76a are deformed or
crushed adjacent the screw 63 and flange 28 respectively.
The ~lade is then secured in the head 11 between the screw
63, flange 28 and screw 64. The securement of the blade is
effected before pressure is removed from the button 73 after
insertion of the blade.
The front guide screw 66 is then adjusted to
engage the side of the blade adjacent the operating portion
the~eof. Also, the stop screw 65 may be adjusted to project
out of bore 41 into the stop pocket 39. The screw 64, or
the stop pocket 39, engages a projection (not shown) on the
block 12 which determines a maximum rotation of the head 11
during the operation.
Cutting of the mat 17 is effected by grasping the
front knob 59 with the forefinger, the locking screw 63 with
the second inger, and the rear knob 61 with the thumb, of
one's hand, the palm of the hand being disposed downwardly
toward the mat 17. The cutting head 11 is then rotated about
pivot 30 such that the operation portion of the blade engages
the mat 17, finger pressure being down and in on knob 59.
As viewed in Figs. 7 and 9, this motion is counterclockwise.
The thumb also presses up and in on knob 61 and against sur-
face 48. The cut is then made by drawing the cutting head
11 backward~ along the guide rail 13 toward the operator,
fi~ger pressure against screw 63 facilitating this. When
the cut is completed, release of the knobs 59, 61 and screw
35 63 allows the spring 87 to return the cutting head 11 to the
rest position.
The blade 76 of this invention 11 employs the
notches 77 as a rapid visual indicator of the non-cutting
edge of the blade 76. The locating edge 78 engaging the
pr~jection 79 provides for automatic positionina of the

-9- ~176557
blade 76 at a stalldard cutting depth position which can be
preset with great precision at the place of ~anufacture, the
operator making adjustments with screw 64 ther, only for non-
standard cuts or mat 17 thicknesses. The edgc 78 also acts
i~ conjunction with the calibrated upper window 81 to display
the position of the blade, which display, bein~3 ahove the
operator t S hand, is viewable during the cutting operation.
During the cutting motion, the natural tendency
of the thumb is to curl about the knob 61 and press against
crank 82. This causes the knob 61 shaft to press against
the break pad insert 84a, the insert 84b in turn ~ressing
against the shoulder bolt pivot at 30. The cutting head 11
remains locked a~ainst pivoting out of engac~ement with the
mat 17 with a minimum amount of pressure upon the crank 82.
This ensures that the blade will remain enga~ed with the mat
17 at a uniform depth throughout the length of the cut. This
function is particularly useful during the making of lengthy
cuts, where the operator must reach a long distance or cut a
first length, reposition hi~self, and then cut a second
length, thereby normally risking a variation of pressure on
the knobs 59, 61 resulting in a non-uniform cutting depth.
The notch 47 provides an additional visual monitor
of the blade position. The notch 47 also provides for hand
removal of the blade in any situation where the mechanism 67
fails. The slot 51 performs an additional function of facili-
tating lubrication of the cutting head 11 shoulder bolt
bearing at 30 without removing a cover plate from the block
12 as in the general industry practice~
'rhe cutting head invention li provides for greater
safety of operation. The notches 77 readily indicate which
edges of the blade are cutting and non-cutting, thereby re-
ducing instances of the operator grasping the wrong edge or
ihserting the blade upside down. The slide mechanism 67
greatly reduces handling of the blade during loading and un-
loading, again reduaing cuts to the hand, most particularlymy minimizing the shoving motion against the hlade required
to load most industry devices. Because ~he cutting head 11
is generally in a horizontal position at rest, the blade can
be removed or installed without pivoting the block 12 guide
rail 13 and cutter bar 14 structures with respect to th~ table

- lo ~ 655~

16, the standard industry practice which tellds to expose the
blade cutting e~lle in a position more likely to cause injury.
The cutting head 11 also retains a generally horizontal posi--
~tion when the block 12, guide rail 13 and cutteJ bar 14 are
``~5 pivoted 180 to the standard industry position for performance
of maintenance,the entire length of the top ed~es 22c, 42c
bearing pressure. This reduces the likelihood of cuts; as
standard industry devices tend to rotate in this situation,
projecting the cuttin~ blade upwardly into a more danqerous
position.
A more precise cut is provided by the invcntion 11due to the plurality of adjustments which can be visually
monitored both prior to, and during, execution o~ a cut.
Also, the precise manner in which the blade is positioned and
held in fixed position by the screws 63, 64 and flange 28
facilitates a constant, precise cut by minimizin~ side to
side wobble and elminating up and down pivoting of the blade.
The positioning of the knobs 59, 61 and additional control
surface 48 also aid in effecting such cuts.
- Industrial Applicability
The features and advantages of the invention 11
are believed to be apparent from the foregoing description.
The invention 11 may also be employed in areas such as that
of cardboard and glass cutting. Although a preferred mode
and modifications thereof have been disclosed herein, it is
to be remembered that various alternate constructions can be
made thereto without departin~ from the full scope of the
invention as defined in the appended claims.

Representative Drawing

Sorry, the representative drawing for patent document number 1176557 was not found.

Administrative Status

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Administrative Status

Title Date
Forecasted Issue Date 1984-10-23
(22) Filed 1981-05-12
(45) Issued 1984-10-23
Expired 2001-10-23

Abandonment History

There is no abandonment history.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Application Fee $0.00 1981-05-12
Owners on Record

Note: Records showing the ownership history in alphabetical order.

Current Owners on Record
X LTD.
Past Owners on Record
None
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.
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Document
Description 
Date
(yyyy-mm-dd) 
Number of pages   Size of Image (KB) 
Description 1993-12-16 10 496
Drawings 1993-12-16 4 107
Claims 1993-12-16 4 167
Abstract 1993-12-16 1 11
Cover Page 1993-12-16 1 13