Note: Descriptions are shown in the official language in which they were submitted.
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This invention relates to pollen traps for beehives.
Floral pollen is the male seed (sperm) of flowers which brings about
the fertilization of the plant. This pollen consists of tiny corpuscles,
50/lOOOths of a millimeter and is produced in so-called "anthers" which form
the upper part of the "stamens" of a plant. These stamens, which vary in num-
ber according to the specie of plant, grow up from the base of the flower as
delicate filaments, which are broadened into small pads at their free ends.
In these pads, the pollen is formed and from these anthers, the foraging bees
collect their pollen.
The worker bees who collect pollen mold it into a solid mass with a
little honey and then attach the resulting kernel to the outer part of their
hind legs.
When a pollen collecting worker bee returns to its hive it stores the
pollen in a separate group of cells from the honey inside the honeycombs, to
be taken out again when needed.
Since pollen is considered by many the perfect food and by others a
diet supplement, it is collected from honey bees by means of pollen traps which
are attached to their hives, In many of the prior art uses, a grid is placed
over the hive entrance so that the bees have to push through it to get in~o
the hive. In doing so, the pollen pellets are dislodged from their legs and
fall into a trough.
Although pollen traps have been placed over the hive entranceways
to collect pollen, most of the devices consisted of a single piece of hardware
cloth or a piece thereof folded back on itself. If a trash grid is not used,
the pollen is contaminated with large amounts of trash including dead bees
accumulated in a pile between the hive entrance and the pollen trap.
Prior art pollen traps that are attached to the entranceways to the
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hives agitate the bees when the traps are removed and interrupt the flight of
the bees into the hives, causing them to gather in front of the hive often in
clusters.
United States Patent No. 3,995,338 discloses a pollen trap with a
cleaning grid mounted on a known beehive. This pollen trap requires the bees
to enter the hive through an unfamiliar entranceway. In addition to an un-
familiar entranceway, the bees have to twist their bodies through a double
screen grid with offset squares to loosen the pollen pellets from their feet.
Further, this pollen trap has no facilities for the worker bees to cluster in
the hive in a warm protected area.
United States Patent No. 4,007,504 discloses a single grid or screen
across the entryway of a hive for controlling the movement of bees into the hive.
The screen is intended to loosen pollen on the legs of the bees as they pass
therethrough. A container is located below the grid or screen for receiving
the pollen falling off of the bees passing therethrough.
French Patent 1,223,455 discloses a drawer employing a grid mounted
at a point spaced from the entranceway of the hive and serving as a pollen trap.
Manuel R. Chepote Malatesta in his article published January 1979 in
the American Bee 30urnal entitled "The Andes Pollen Trap" discloses the benefits
-
of a double layer wire mesh for removing pollen from the legs of the bees.
There is no teaching of mounting this in an easily removable drawer which keeps
the pollen from piling up at the entranceway of the hive.
In accordance with the invention claimed, a new and improved pollen
trap is provided which, forming an entranceway to the hive, effectively removes
a desired amount of the pollen from the legs of the bees by means of a trap
that may be mounted at the bottom, middle or top of the hive.
It is, therefore, one object of this invention to provide a new and
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improved pollen trap.
According to the invention there is provided a pollen trap for
collecting pollen from bees as they enter a vertically arranged beehive com-
prising: a frame having an open top and dimensioned to fit as one of the
axially positioned parts of a vertically stacked beehive, a drawer slidably
arranged in said frame to assume a substantially horizontal position in the
hive, said drawer having a bottom surface comprising a first screen, the mesh
size of which is smaller than the pollen dropped thereon by the bees~ a second
screen mounted in said frame above said drawer and having a mesh size smaller
than the size of the po~.len carrying bees for prohibiting them from entering
the drawer, a pair of parallelly and spacedly arranged third and fourth
screens mounted in a sub-frame on said frame, but offset above said second
screen and forming a space between said second screen and said pair of screens,
said third and fourth screens having mesh openings offset from each other
causing bees crawli.ng through said pair of screens to be forced to follow a
circuitous path divesting their legs of a substantial portion of the pollen
carried thereon, said sub-frame having at least one rail mounted longitudinally
of said drawer juxtapositioned to the lowermost screen of said pair of screens
downstream of the direction of movement of the bees and :Eorming a ladder for
the bees to use in reaching said pair of screens, and an entranceway for the
pollen carrying bees i.nto the pollen trap positioned adjacent the front of
said drawer and connected with said space between said second screen and said
pair of screens, whereby the bees may move through said pair of screens at a
plurality of points along their lengths.
Embodiments of the present invention will now be described, by way
of example, with reference to the accompanying drawings, in which:
Figure 1 is a perspective exploded view of a modern beehive;
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Figure 2 is a side view of a modification of the beehive shown in
Figure 1 employing the new pollen trap at its base;
Figure 3 is a view similar to Figure 2 showing the novel pollen
trap at the top of the beehive;
Figure 4 is a view similar to Figures 2 and 3 showing the novel
pollen trap in the center of the beehive;
Figure 5 is a partial perspective view of one means of attaching
the bottom board to a pollen trap;
Figure 6 is a partial side view showing the connection of the bottom
board and pollen trap employing the connection means of Figure 5;
Figure 7 is a partial perspective exploded view of a catch means for
interconnecting two adjacent parts of the beehive;
Figure 8 is a cross-sectional view of the parts shown in Figure 7
illustrating the catch in engaging position;
Figure 9 is an exploded perspective view of a pollen trap embodying
the invention;
Figure 10 is a cross-sectional view of the structure of Figure 9
showing the direction of travel of the bees moving through the trap when used as
either a middle or top trap or in a double queen colony;
Figure 11 is an enlargement of the circled area 11 of Figure 10;
Figure 12 is a top view of the wire grating in the pollen trap show-
ing the offsetting of the squares of the mesh in the two associated screens
of the trap;
Figure 13 is an exploded perspective view of a modification of the
pollen trap shown in Figure 9 without queen excluder wire;
Figure 14 is a cross-sectional view of the pollen trap shown in
Figure 13 illustrating the path of movement of the bees when used in a middle
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or top trap configuration;
Figure 15 is a partial exploded perspective view of another modifi-
cation of the pollen trap shown in Figures 9 and 13;
Figure 16 is a cross-sectional view of the pollen trap shown in
Figure 15 illustrating the path of movement of the bees;
Figure 17 is a front view of a further modification of the pollen
trap shown in Figures 13 and 15; and
Figure 18 is a cross-sectional view of the pollen trap shown in
Figure 17.
Referring more particularly to the drawings by characters of refer-
ence, Figure 1 discloses a modern beehive 20 comprising a pallet supported
bottom board 21, a brood nest or box 22, a queen excluder 23 comprising a grate
mesh formed of wire 0.163 to 0.167 inches apart, one or more honey storage
supers 24, an inner cover 25 and a cover or roof 26.
The queen excluder 23 is an important piece of equipment for some
beekeepers since it has spaces wide enough so that worker bees may pass through
but the queen and drone bees cannot. If the queen excluder is placed above
the brood nest, the queen is confined in that area and cannot lay eggs in the
honey storage area of the supers.
The brood nest 22 and super 24 comprising an open ended rectangular
shell contain a plurality of hanging combs or frames 27. Although ten frames
are shown in the brood nest 22 in Figure 1, many beekeepers use nine frames in
the standard hive. The slightly wider spacing makes it easier to remove the
combs and to inspect the brood nest.
In the super 24 (the honey storage area~, beekeepers use nine frames
evenly spaced. By using nine frames in a ten frame beehive, the bees, due to
the wider spacing in the super than in the brood nest, draw out the cells making
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them deeper, thereby easier to uncap by the beekeeper.
There are also eight to twelve frame beehives with smaller or larger
brood boxes, respectively. The disclosed pollen traps are built smaller or
larger to fit these often called non-standard hives.
Each hanging frame 27 is rectangular in form and designed to leave
a bee space all around. Lugs 28 are formed as extensions of the top bar 29 so
that the frames can be hung from rebates in the side walls of the brood nest
and super or from the built out portions of these parts of the hive. Sheets
of wax foundation 30 complete the well known frame construction.
An entranceway 31 into the beehive is generally formed between the
bottom board 21 and the bottom of the brooder box 22, as shown in Figure 1.
In accordance with the invention claimed, a new and improved pollen
trap 32 is added to the modern beehive 20 in such a manner that the young bees
in the hive are not stressed and the flight of bees coming into or leaving the
hive are not unduly obstructed.
Although the pollen trap 32 is generally mounted on the bottom board
21 and between it and the brood box 22 as shown diagrammatically in Figure 2,
it may also be mounted at the top oP the hive as diagrammatically shown in
Figure 3 or in the middle of the hive as diagrammatically shown in Figure 4 and
operate effectively. The parts of the hives including the pollen trap 32 may
be readily interconnected by suitable means such as the pin and socket arrange-
ment shown in Pigures 5 and 6.
Figures 5 and 6 illustrate a clip 33 which is secured to a part of
the bottom board 21 of the hive and clips around a part of the frame of the
pollen trap 32. In this manner the base board of the hive may be interconnected
with the pollen trap to form a unitary structure if so desired.
To hold the parts together a pivotally mounted latch 36 and ca~ch 37
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of the well known type may be fastened to the outside surfacc of two adjacent
parts of the hive, such as the base board 21 and pollen trap 32 as illustrated
in Figures 7 and 8.
Figures 9-12 disclose in more detail a pollen trap 38 which may be
positioned in any one of the three positions diagrammatically shown in Figures
2-4. This embodiment of the pollen trap comprises an open ended rectangular
box-like frame 40 having a rectangular shaped drawer 41 slldably mounted on a
pair of rails 41A fastened to the sides 40A of frame 40 to extend into frame
40 from end 42 thereof through an opening 43. Opening 43 is larger than the
front plate or handle 44 of the drawer, thereby providing an entranceway 45
above the plate or handle 44 for the worker bees 46 to enter the pollen trap as
shown in Figure 10.
Drawer 41 is provided with a partition 47 extending laterally across
its longitudinal axis near the front of the drawer and, together with a shelf
48, forms a part of the entranceway 45 of the pollen trap, directing the bees
upwardly through a passage 49 extending between a pair of spaced grating or
offset screens 50 and 51 of predetermined size mesh and a lower screen 52 and
then downwardly through a passageway 53 into brood box 22 as shown by arrows
B. Screen 52 comprises a mesh smaller than the size of the worker bees and
forms a barrier over the top of drawer 41.
It should be noted that a different diameter of screen is used on
the bottom of the pollen drawer to reflect the atmospheric temperatures surroun-
ding the colony. When the humidity is dry and below 30-50%, relatively small
mesh screen is used since air circulation is not necessary to dry out the pollen.
When the humidity is above 80% a wire mesh of a relatively larger size is used
on the bottom of the pollen drawer to permit the maximum circulation of air
and heat through the pollen to help remove ~he moisture and dry the pollen.
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It is proposerl that a screen having 7 squares to the inch formed
from wire of a diameter .018 of an inch be used over the pollen drawer to allow
the pollen to fall through into the pollen drawer and yet keep the bees out of
the pollen drawer. Every other known trap either uses mesh of 8 squares to the
inch or 6 squares to the inch over the pollen drawer. The 8 squares to the
inch screen is such a small mesh that in the times of pollen f]ows of large
granules they pile up on the corners of the wire and eventually create a solid
mass of pollen up through the wire and theoretically could permit the colony
to smother. The wire mesh of 6 squares to the inch is large enough so that bees
penetrate the wire and enter the pollen drawer, yet the wire is small enough
that the bees cannot then escape but are left in the pollen drawer to eat the
pollen and eventually die. Neither the 8 nor the 6 squares to the inch mesh
are correct for the screens over the pollen drawer. Only 7 squares to the inch
is ideal and accomplishes both tasks of allowing the pollen to free flow into
the pollen drawer regardless of the size of the granules and yet keep all bees
out of the pollen drawer.
This trap is unique in that the two layers of a screen having a
mesh employing 5 squares to the inch of a .023 d;ameter wire are offset or
staggered horizontally both up and across. No other known pollen trap employs
a mesh of 5 squares to the inch staggered in both directions. This staggering
of the screens achieves a 25% greater efficiency in trapping the pollen from
the worker bees than heretofore accomplished.
It should be noted that this type of pollen trap must be placed at
the top or in the center o a beehive as illustrated diagrammatically in
Figures 3 and 4 of the drawing.
F.igures 9 through 12 illustrate that the portion of the pollen trap
32 comprising the mesh screens 50, 51 and 52 is mounted in a detachable sub-
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frame 54 which rests in frame 40 on a pair of ledges 55, one attached to each
of ;ts sides 40A. The sub-frame 54 is provided with lattice straps 39 which
serve as laddcrs for the bees.
As indicated in Figure 10, the bees enter the hive and the pollen
trap through the entranceway 45 and move into and along a passageway 49 between
grids or screens 50 and 52. At this point, the bees have to crawl through the
openings in the grid or screen 50 and then crawl through the openings in the
grid or screen 51 which are offset from the openings in screen 50. The function
of the pollen traps is to force the incoming foraging bees with pollen pellets
on their hind legs to twist their bodies through the openings in screens 50 and
51. In twisting through the grid formed by these screens, pollen pellets are
scraped off of their legs and fall down through screen 52 into the pollen drawer
41 above a screen 56 positioned at the bottom of the drawer.
Figures 13 and 14 illustrate a modification of the pol]en box shown
in Figures 1-12 wherein pollen box 58 comprises a frame 59 having a drawer 60
slidably mounted therein. The bottom o the drawer is formed by a fine mesh
screen 61. Adjacent the top of the drawer is mounted a second screen 62 having
a mesh size small enough to prohibit the worker bees from passing therethrough.
A sub-frame 63 comprising a pair of support braces or rails 64 extending longi-
tudinally thereof is covered by a pair of closely spaced offset screens 65
and 66 through which the worker bees pass in the twisting manner disclosed in
the description of pollen box 38.
As shown in Figure 14, the worker bees enter the hive in the direc-
tion of arrows B through the entranceway 67 and pass into the passageway 68
extending along the length o drawer 60 between screens 62 and 65. At this
point, the bees climb up the rails 64 and wiggle through the offset screens 65
and 66 dropping or rubbing off o their legs a good share of the pollen collected
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by them. This pollen falls through screen 62 and is collected on screen 61
along the full length of the drawer.
After passing through screens 65 and 66, the worker bees pass down-
wardly through a cluster area 69 formed behind a partition 70 behind drawer 60
in the pollen trap 58. From this area 69, the worker bees may move into the
brood box 22 or super 24 depending on how the hive parts are assembled. This
pollen trap may be positioned at the top or center of the hive as illustrated
in Figures 3 and 4.
Figures 15 and 16 illustrate a further modification of the pollen
lQ traps shown in Figures 1-14 wherein pollen trap 71 comprises a drawer 72 slid-
ably mounted in a frame 73 and is used as a bottom trap below the entire bee-
hive. Frame 73 is mounted on the bottom board 21 of a hive and provides an
entranceway 74 for the worker bees which is connected to a passageway 75 extend-
ing along the length of the pollen box ~mderneath drawer 72, with further
passageways 76 and 77 interconnected with passageway 75 arranged at the front
of the drawer and behind it in frame 73.
The bottom of drawer 72 is covered with a fine mesh wire 78 and the
top of the drawer as well as frame 73 is covered by a frame 79 supported in
the top of the frame by suitable supporting ledges (not shown~.
Frame 79 is covered by a pair of spacedly arranged o$fset wire grids
or screens 80 and 81 through which the bees wiggle causing them to scrape off
of their legs the pollen, as heretofore explained, and a bottom grid or screen
82 defining between grids or screens 81 and 82 a passageway 83 along the top
of the drawer 72 for the bees to move freely in. It should be noted that frame
79 is reinforced by one or more longitudinally extending rails 84 in the manner
of the other pollen traps for the bees to use as ladders as they crawl up to
and wiggle through the mesh openings in the grids or screens 80 and 81.
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This pollen trap is usually positioned at the bottom of a hive as
diagrammatically shown in Figure 2 causing the worker bees to move across the
bottom of the drawer from either the front or back of the pollen trap when the
bees enter the pollen trap, thereby eliminating most of the entranceway pile-up
and clus~ering of the worker bees in front of the hive. As evident from
Figures 9 and 16, an exit way 85 is provided for the drone bees, and the queen
bee if she chooses, in the back of frames 40 and 73 since these bees are too
large to enter and exit through the double five squares to the inch wire
meshes 50 and 51 used by the worker bees.
Figur0s 17 and 18 illustrate a still further modification of the
pollen traps shown in Figures 1-16 wherein pollen trap 86 comprises a frame 87
in which is slidably mounted a drawer 88 the top of which is always covered
with a screen the wire mesh of which is small enough to prohibit the worker bees
from crawling into the drawer. Ahove the drawer 88 in frame 87 is mounted a
pair of offset screens 89 and 90 the mesh of which is large enough to permit
the worker bees to wiggle therethrough. In this embodiment the drawer extends
the full length of the frame. This pollen trap is used on the bottom of a hive
as shown in Pigure 2.
Two exits 91 and 92 are shown as being provided above the entrance-
way 93 for the worker bees or preferably to the rear of the pollen trap for use
by the drones and queen bee as heretofore explained.
