Not Applicable
Not Applicable
1. Field of the Invention
The present invention relates to dough preparation, more particularly, to machines for rolling dough into balls.
2. Description of the Related Art
Rounding is an important step in the baking process. The prior art includes a number of different apparatuses for rounding dough. One type of dough rounder is describe in U.S. Pat. No. 3,899,275. An auger consists of a spiral ramp rigidly secured to the outer wall of a tubular cylinder and is mounted to a base. A cylindrical drum is mounted to rotate about the auger such that the outer edges of the ramp are contiguous to the inner wall of the drum. The ramp is inclined downwardly and outwardly across its width to push pieces of dough on the ramp against the inner wall of the drum. A fixed dispenser plate at the bottom of the cylinder directs pieces of dough dropped down the cylinder through an opening in the side wall of the cylinder and on to the ramp. Rotation of the drum moves the dough upwardly on the ramp to the upper edge of the cylinder and drum. Constant pressure of the drum wall and the ramp on the dough rounds the dough as it moves to the top of the drum. The ramp stops at the upper edge of the drum and when the dough ball reaches the top of the rounder it drops over the edge of the drum onto a suitable surface.
There are several shortcomings with this design. The bottoms of the drum and auger are mounted to the base of the apparatus, with the auger on a post fixed to the base and the drum on a spindle that rotates around the auger. Because there is no side support for the drum, side to side motion of the drum is not prevented. As the dough travels up the auger, it presses against the inside of the drum. This has the effect of pushing the drum away from the auger a small amount, producing a gap on the order of 1/16 to ¼ inch where the dough is and pulling the drum into the auger on the opposite side. The constant rubbing of the drum against the auger as the drum rotates causes premature wear of the drum.
Correct operation of the dispenser plate relies on the dough being relatively moist. If the dough is too dry or sticky, it jams against the opening to the auger ramp or sticks on the dispenser plate, never reaching the ramp.
Then the operator has to turn the machine off and reach down into the auger cylinder to release the dough.
The basic dough rounder of the present invention has a base and housing, a motor with the gearing, control, and power, a turntable, a drum, an auger, and a cover. The drum is mounted to the turntable and the auger is mounted to the base. When the motor rotates the turntable, the drum rotates around the auger. The cover mounts on top of the auger and drum.
The dough rounder of the present invention has several differences from rounders of the prior art, including the drum and auger mounting mechanism, two improved dispenser designs, and a swappable dough tray.
The drum and auger mounting mechanism, which includes a lower mounting mechanism and an upper mounting mechanism, substantially prevents lateral motion of the drum relative to the auger. In one configuration of the lower mounting mechanism, a vertical shaft from the bottom of the auger fits into an opening in the base that is only slightly larger than the shaft so that there is minimal lateral motion of the auger. In another configuration of the lower mounting mechanism, a vertical pin extending upwardly from an opening in the base fits into an opening in the bottom of the auger that is only slightly larger than the pin so that there is minimal lateral motion of the auger. In another configuration, an annular extension on the bottom of the auger fits into an annular gap on the turntable that is only slightly wider than the thickness of the annular extension so that there is minimal lateral motion of the auger. In all configurations, the bottom end of the drum is open to fit around the turntable. Protrusions from the turntable fit into notches in the bottom drum, thereby attaching causing the turntable to support the drum and the drum to rotate with the turntable.
In one configuration of the upper mounting mechanism, a pair of collar support rods extend upwardly from the base to support a collar. The collar has a round opening slightly larger than the outside diameter of the drum. Support rods extend upwardly from the collar above the collar support rods. In another configuration of the upper mounting mechanism, a pair of support rods extend upwardly from the base. A collar fits over the support rods. The collar has a round opening slightly larger than the outside diameter of the drum. The auger has a pair of horizontal handles. In one configuration, each handle has an aperture that fits around the knobs at the top of the support rods. In another configuration, the ends of the handles fit into semicircular walls on the top of the supports rods. When the auger is inserted into the drum, the handle apertures are aligned with the knobs or the handles are aligned with the walls and then lowered until the apertures fit onto the knobs or the handles fit into the walls, thereby capturing the handles to prevent lateral motion and supporting the weight of the auger.
The conical dispenser mechanism has a conical projection extending upwardly from the center of the turntable, with an angle from horizontal in the range of from approximately 40° to approximately 60°. A scraper, in two embodiments, is mounted to the auger cylinder wall. The first embodiment is a solid with a hollow that surrounds a majority of the side wall of the conical projection, leaving one portion facing the side opening of the cylinder exposed. The scraper surface has an angle from horizontal in the range of from approximately 40° to approximately 60°. The second embodiment of the scraper is a spatula with a generally parabolic edge that surrounds and abuts the conical projection side wall. The spatula surface has an angle from horizontal that is in the range of from approximately 45° to approximately 65°. The spatula has a bracket that securely mounts it to the cylinder surface opposite the cylinder side opening.
The flexible dispenser plate has a plate with a smooth surface that extends at an angle from a bracket. The bracket is either permanently or removably mounted to the cylinder wall opposite the cylinder side opening. Alternatively, the bracket is suspended from the top edge of the auger by a hook. The plate/bracket junction is flexible such that when the dough strikes plate, the plate deflects downwardly and pushes the dough out of the cylinder when the plate rebounds. The plate surface 160 has an unflexed angle to horizontal in the range of from approximately 45° to approximately 70°. Optionally, a spring between the bracket and cylinder wall provides greater rebound.
The dough balls exiting from the drum/auger are directed to a swappable dough tray. The top surface of the housing over the motor compartment is a flat shelf and the top of the drum/auger compartment overhangs the shelf by a small amount. The tray rests on the shelf with the tray lip under the overhang. The tray's weight retains it in place.
For a fuller understanding of the nature and object of the present invention, reference is made to the accompanying drawings, wherein:
The basic dough rounder 10 of the present invention is shown in the figures. It has a base 12 and housing 13, a motor 14 with the attendant gearing 24, control 26, and power (not shown) in a housing 15, a turntable 16, a drum 18, an auger 20, and a cover 22. The housing 13 has two compartments, the motor compartment 15 and the drum/auger compartment 21. The gearing 24 operatively connects the motor 14 to the turntable 16 and has a cover 25 for protection and safety. The motor compartment 15 has a removable panel 27 and the drum/auger compartment has a hinged panel 23. The auger 20 is a cylinder 19 with a spiral ramp 30 rigidly secured to the outer wall.
As with prior art dough rounders, the motor 14, via the gearing 24, rotates the turntable 16 on a vertical axis. The drum 18 is mounted to the turntable 16 and the auger 20 is mounted to the base 12 inside the drum 18. The outer rim of the auger ramp 30 engages with the inner surface 28 of the drum 18. When the motor 14 is actuated, the drum 18 rotates around the auger 20. The optional cover 22 mounts on top of the auger 20 and drum 18.
The dough rounder 10 of the present invention has several differences from rounders of the prior art, each of which constitutes a separate invention. The differences include the mechanism by which the drum 18 and auger 20 are mounted, three improved dispenser designs, and a swappable dough tray 26.
A. Drum/Auger Mounting Mechanism
The drum 18 and auger 20 mounting mechanism of the present invention substantially prevents the lateral motion of the auger 20 and the drum 18 relative to each other. There are two components to the mounting mechanism, the lower mounting mechanism 34 and the upper mounting mechanism 36. The lower mounting mechanism 34 substantially prevents lateral motion of the bottom of the drum 18 and auger 20 relative to each other. The upper mounting mechanism 36 substantially prevents lateral motion of the top of the drum 18 and auger 20 relative to each other and holds the auger 20 fixed relative to the base 12 so that the drum 18 rotates about the auger 20.
One configuration of the lower mounting mechanism 34 is shown in
Another configuration of the lower mounting mechanism 34 is shown in
Another configuration of the lower mounting mechanism 34 is shown in
In all configurations of the lower mounting mechanism 34, the bottom end of the drum 18 is open, as at 58 in
One configuration of the upper mounting mechanism 36 is shown in
Another configuration of the upper mounting mechanism 36 is shown in
The auger 20 has a pair of horizontal handles 86 extending from opposite sides of the auger 20 adjacent to (at or near) the top end of the cylinder 19. There may be more than two handles. At the end of each handle 86 is an aperture 88 that has a diameter the slightly larger than the diameter of the knob 78, 212. The distance between the two apertures 88 is the same as the distance between the two knobs 78, 212.
Alternatively, as shown in
The drum 18 is installed by inserting it into the collar opening 84, 210, aligning the notches 60 with the protrusions 62, and lowering the drum 18 until the protrusions 62 are in the notches 60. The auger 20 is inserted into the drum 18 and rotated until either the handle apertures 88 are aligned with the knobs 78, 212 or the handle ends 94 are aligned with the inside of the walls 92. The auger 20 is lowered further into the drum 18 until either the handle apertures 88 fit onto the knobs 78, 212 or the handle ends 94 fit into the walls 92 and the handles 86 rest on the support rods 76, 202. The knobs 78, 212 or walls 92 removably attach the handles 86 to the support rods 76, 202, capturing the handles 86 to prevent the auger 20 from rotating relative to the base 12.
As described above, the handles 86 are supported by the support rods 76, 202. However, the present invention contemplates that the handles 86 may be supported by any apparatus that can support the weight of the auger 20. The support may be walls, rather than rods, that extend upwardly from the base 12. The support rods 76, 202 or other support apparatus is generally referred to as auger supports.
As the handles 86 are being lowered onto the support rods 76, 202, the lower mounting mechanism 34 is also engaged, either the auger mounting shaft 42 is within the base opening 40 of
Because of the lateral support provided to the drum 18 and the auger 20 by the mounting mechanism 34, 36, the drum 18 and auger 20 do not substantially move laterally relative to each other, greatly reducing wear on the drum 18 as compared to the dough rounders of the prior art.
B. Conical Dispenser Mechanism
As described above, dough can become stuck on the fixed dispenser plates of the prior art. The conical dispenser mechanism 100 of the present invention is one design for preventing dough from becoming stuck and is shown in
The conical dispenser mechanism 100 is not compatible with the first configuration of the lower mounting mechanism 34 of
The bottom of the auger cylinder 19 is open, as at 120 and the conical projection 102 extends into the opening 120 when the auger 20 is installed in the drum 18.
Securely mounted to the cylinder wall 126 is a scraper 122 that has two embodiments. The first embodiment, shown in
In the second embodiment, shown in
Because the scraper 122 is attached to the auger cylinder wall 126 and the conical projection 102 is attached to the turntable 16, the conical projection 102 rotates within the scraper 132. As dough falls down the cylinder 19, it hits the rotating conical projection wall 108. As the conical projection 102 rotates, the wall 108 moves the dough to the scraper 122. As the wall 108 passes under the scraper 122, the dough is scraped from the wall 108, directing it to the ramp 30.
C. Flexible Dispenser Plate
The flexible dispenser plate 150 of the present invention is another design for preventing dough from becoming stuck and is shown in
The plate/bracket junction 156 is relatively flexible such that when the dough strikes the deflecting surface 160 as it comes down the cylinder 19, the plate 152 deflects downwardly a short distance, as at 162. As the plate 152 rebounds upwardly, the deflecting surface 160 pushes the dough through the cylinder side wall opening 118 and onto the ramp 30.
The plate 152 and bracket 154 can be a unitary piece, such as a single metal sheet, as in
In order to properly direct the dough onto the auger ramp 30, the deflecting surface 160 has an unflexed angle 164 to horizontal that is in the range of from approximately 45° to approximately 70°, and is preferably in the range of from approximately 50° to approximately 60°.
Optionally, the deflecting surface 160 is smooth from a coating or layer 166 of a smooth or low-friction material, as in
Optionally, as shown in
D. Swappable Dough Tray
The dough balls exiting from the drum/auger are directed to a dough tray. The present invention provides a swappable dough tray 170 for a dough rounder. As seen in
Thus it has been shown and described a dough rounder which satisfies the objects set forth above.
Since certain changes may be made in the present disclosure without departing from the scope of the present invention, it is intended that all matter described in the foregoing specification and shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense.
The present application claims the benefit of and priority to U.S. Provisional Patent Application No. 61/309,153, filed on Mar. 1, 2010 for DOUGH ROUNDER in the names of Andrew Voyatzakis and George Athanasiadis, hereby incorporated by reference in its entirety, and U.S. Provisional Patent Application No. 61/366,572, filed on Jul. 22, 2010 for DOUGH ROUNDER in the names of Andrew Voyatzakis and George Athanasiadis, hereby incorporated by reference in its entirety.
Number | Date | Country | |
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61309153 | Mar 2010 | US | |
61366572 | Jul 2010 | US |