Note: Descriptions are shown in the official language in which they were submitted.
BACKGROUND OF THE INVENTION
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This invention relate to a razor blade asset-
by, in the form of a complete razor of a shaving unit
for a razor. By "shaving unit" is meant a blade assembly
which can be mounted on or formed integrally with a
handle or a razor frame to provide a complete razor. In
particular the invention relates to a disposable razor,
that is to say one that is intended to be disposed of by
the user when he considers that the razor is no longer
giving an adequate shave. More particularly, the invent
lion relates to the provision, in such a blade assembly,
of means movable to expose the cutting edge of the blade
for shaving or to render it safe so that it cannot harm
anyone handling the blade assembly.
BRIEF SUMMARY OF THE INVENTION
A razor blade assembly whose components comprise
a razor blade having a cutting edge, a top cap which at
all times extends over the blade and a guard bar located
at the forward end of the assembly and spaced from the
adjacent edge of the top cap to Norm an opening there-
between, and having means supporting the blade for pivot
at movement about an axis parallel to the cutting edge of
the blade relative to said top cap between a first
position in which the cutting edge of the blade is ox-
posed in said opening for shaving and a second position
in which the cutting edge is retracted with respect to
said opening and is no longer exposed for shaving but is
securely retained in said assembly beneath said cap.
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BRIEF DESCRIPTION OFFERINGS
The invention will be better understood from a
consideration of the following description of . two
constructions of razor in accordclnce with the present
invention which will be described, by way of example only,
with reference to the accompanying drawings in which:-
Figure 1 is a side elevation, part in section, of one form of razor in accordance with the invention;
Figure 2 is a rear elevation of the-razor of Foggily;
Figure 3 is a section through the razor head showing
the blade in a "shaving" position;
Figure 4 is a section through the razor head showing
the blade in a safe" position,
inure 5 is an exploded perspective view of the head
of the razor and
Figures 6 and 7 are sections through the razor head
of a modification of the embodiment of figures 1 to 5
showing the "shaving" and siphon positions of the razor
blade respectively-
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EXILED DURATION
The razor illustrated in the accompanying drawings informed by two main components, the first being a handle 10
at one end of which a razor head if is fcrme~ integrally.
The handle and head can be mounded in one piece in
plastics material.
The second component of the razor is a blade platform
12 on which a blade 13 (or if desired a parallel-spac~d
pair ox blades is mounted between blade locating posts I
and secured to the platform by rivets 15, the pouts 14 and
rivets 15 being formed integrally with the platform.
On the side of the platform 12 which is adjacent the
cutting edge aye of the blade 13, a suardbar 16 is formed
integrally with the platform, the guard bar being connected
Jo the platform by webs 17. The webs 17 are spaced apart
along the guard bar to form apertures between the guard bar
and the platform through which water can be directed to
wash the blade edge.
Pivot pins lo project from the opposite ends of the
platform along a line parallel to and below the cutting
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edge of the blade for engagement in bearing apertures or
recesses 19 in the head 11 to be described below.
The side of the platform 12, which is parallel Jo but
remote from the guard bar, is formed with an operating bar
20. The operating bar carries ribs 21, on its rearward
surface for engagement by the finger of a user, and a pair
of detents 22 located at opposite ends of the bar 21 for
a purpose to be described below,
The razor head 11 is formed as a V-section trough 23
which is defined between two triangular shaped end walls
24, an upper wall 25 forming a top cap of the razor, a
base wall 26 which is integral with the upper end of the
razor handset and a rear wall 27 which is integral with
the end walls 24 and upper wall 25 but spaced from the
base wall 26. The upper wall 25 and base wall I are
spaced apart, the spacing at their forward edges being
less than at their rearward edges to provide the V section
trough there between. The end walls 24 are arranged to fit
over the ends of the integral blade pia~form and guard bar,
the forward ends of the walls 24 containing the bearing
apertures 19 in which the pivot pins 18 are received.
The rearward edge aye of each of the end walls 24 of
the razor head is formed with a pair of spaced
indentations 24b, which are engage able resiliently by the
detents, such as 22, of the operating bar 20 when the
razor platform is in its uppermost tilted position or in
its lowermost tilted position respectively to lock the
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platform in these positions
The uppermost tilted position, which it shown in
Figure 3, is the shaving or blade-exposed, position of
the razor blade. In this position the blade is at the
correct shaving angle and location relative to those
surfaces of the guard bar 16 and of the top cap 25 which
contact the skin of the shaver. The lowermost tilted
position, which is shown in Figure 4, is the travel, or
'safe' position of the razor blade in which the blade edge
is withdrawn from the shaving position and lies a
sufficient distance below the opening defined between the
top cap 25 and guarder 16 to be ion a position in which it
cannot injure anyone handling the razor The resiliency
of the bearings and of the detents allows the detents to
hold the blade platform securely in the positions of
Figures 3 or 4 yet permits the blade platform Jo be moved
between these positions by finger pressure on the bar 20.
he V section trough 23 has the manufacturing
advantage that assembly of the razor merely requires that
the blade platform with blade or blades secured thereto is
inserted into the trough and with the bearing pins
resiliently urging thy end walls 24 apart until these pins
engage in the wearing apertures at which time the detents
22 engage one set of the indentations 24b. Guide channels
of progressively decreasing depth may be provided on the
inner races of the end walls to guide the pivot pins into
the bearing apertures
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In a modification of the above described embodiment,
and as illustrated in figures 6 and 7 the razor head is
formed by a pair of end walls 124, a top cap 125 and a
rear wall 126 which is integral with the top cap 125
along its rearward edge and with the end walls 124 along
their rearward edges. the rear wall also being integral
with the upper end of the razor handle 110.
The razor has a blade platform 112 and blade 113
constructed and movable in substantially the same way as
the blade and platform of the first-described embodiment
except that the rear wall 126 is wormed with a slot 127
extending longitudinally of the handle in which a peg 121
on the platform can engage and slide. The peg 1~1
projects through the slow 127 to enable the peg to be
engaged by a finger or thumb of the user. By pushing the
peg along the slot, the platform 112 together with the
blade 113 pivots about the axis of pivot pins 118.
The blade platform is formed with a detent 122 for
engagement in the "shaving" position of the blade with a
recess 128 on the rear wall 126, so that in the shaving
position, the blade is securely located and held, although
the razor head is not stressed.
In a modification (not illustrated) of the firs and
second embodiments of the invention, the pivot pins 118
are formed on the end walls 124 and the bearing apertures
are wormed in the blade platform
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In another modification (not illustrated) of the
first and second embodiment of the invention, the
guard bar is formed integrally with the end walls of the
razor head, so that only the blade and blade platform are
pivotal movable.
Although the invention has been described in relation
to disposable razors, the novel features of the invention
reside primarily in the head of the razor and are
therefore applicable to a shaving unit
The expression 'pivotal movement' as used herein is
intended to include all forms of rotational movement,
whether about a fixed axis or a moving axis .
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