CA2319331A1 - Conveyorized bun griller with non-marking belts - Google Patents
Conveyorized bun griller with non-marking belts Download PDFInfo
- Publication number
- CA2319331A1 CA2319331A1 CA002319331A CA2319331A CA2319331A1 CA 2319331 A1 CA2319331 A1 CA 2319331A1 CA 002319331 A CA002319331 A CA 002319331A CA 2319331 A CA2319331 A CA 2319331A CA 2319331 A1 CA2319331 A1 CA 2319331A1
- Authority
- CA
- Canada
- Prior art keywords
- bun
- griller
- conveyor
- belt
- conveyor belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/08—Bread-toasters
- A47J37/0864—Bun toasters
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/08—Bread-toasters
- A47J37/0857—Bread-toasters with bread supports or heating means movable during the toasting operation
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Belt Conveyors (AREA)
Abstract
A conveyor bun griller (10) having a textured low-friction conveyor belt surface (18). This surface (18) has more friction than an untextured lowfriction surface, thus permitting the buns to be grilled without aesthetically undesirable markings, but also without creating handling problems for users of the griller.
Description
CA 02319331 2000-10-04 ' CONVEYORIZED BUN GRILLER WITH NON-MAItKirTG BELTS
The present invention relates to a mechanized bun grilling device having a bun conveyor belt that does not mark the exterior of the buns during grilling.
In particular, it relates to a high temperature, solid weave non-stick conveyor belt for use in a conveyorized bun griller.
BACKGROUND OF THE INVENTION
to Contact toasting of buns has been offered to the commercial food service market for a number of years. The method of moving product in a conveyor across a hot surface to toast the product is referred to as conveyor bun grilling.
This grilling method requires the bun to be pressed against the hot surface as it is moved along the conveyor, to provide quick, even toasting.
Horizontal grillers having a heated bun discharge and holding area are known in the art. These grillers preferably utilize a spring tension track support to apply pressure to the bun, to ensure even and adequate grilling. However, grillers of this design have been subject to certain limitations. For example, while the spring tension track support provides a more uniform toasting of the cut side of the bun, by pressing the cut surface firmly and evenly against the grilling surface, it also leaves markings on the exterior of the bun. The pressure applied by the spring tension track support creates these markings on the rounded surface of the bun These markings can be considered to be aesthetically undesirable.
Accordingly, a conveyor bun griller is needed that can effectively grill the cut surfaces of a bun, without creating undesirable markings or impressions on the exterior of the bun.
CA 02319331 2000-10-04 ., Different wire type conveyor belts having tighter spacings were evaluated in attempting to reduce the incidence of bun marking. The belt with the tightest spacing tested was a wire mesh belt that was 90% closed. These wire mesh belts were heavy, however, which reduced the ability of the spring track to conform to the shape of the bun. Moreover, the metal conveyors continued to cause an impression or conveyor mark on the bun, and accordingly, were not satisfactory.
Next, attempts were made to cover the existing wire conveyor with a belt material. Due to the high operating temperature of the conveyor, a to polytetrafluoroethylene sheet material was selected. This material is also the preferred material for use on the hot top platen griller surface. While the results were positive -- the wire belt markings were eliminated - the smooth, slick surface of the polytetrafluoroethylene material caused problems with the feeding of the bun. Upon initial infeed, the bun would not enter the area between the upper hot t 5 platen and the lower conveyor belt without manual assistance. Once the bun was between the platen and conveyor, the bun would move, maintaining contact to toast when set at minimum pressure. However, as pressure would be applied to increase the toasting results, the compression would cause the bun to stall on the slick track surface.
Accordingly, a conveyor bun gciller is needed that can prevent markings on the exterior of the bun, while conveying the bun reliably, without catching or stalling. The goal is to maximize the initial pressure applied to the bun while the bun is most resilient ("preferably below about 1300F). This allows for maximum heat transfer. Once the bun absorbs heat the softened product will deform.
Thus, the compression by the belt is reduced at the end of the cycle.
SUMMARY OF THE INVENTION
3o The present invention provides a conveyor bun griller having a conveyor belt with a textured low-friction surface with thermally conductive properties. This surface has more friction than as untextured low-friction surface, thus permitting the buns to be grilled without aesthetically undesirable markings, but also without creating handling problems for users of the griller.
Figure 1 is a side view of a preferred conveyor bun griller of the present invention;
Figure 2 is a cross section of a conveyor belt track of the griller of Figure 1;
and Figure 3 is a partial cross section of an alternate embodiment conveyor belt according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A preferred conveyor bun griller 10 is depicted in Figure 1. Griller 10 2o includes conveyor belt 12, seated between spring tension track support 14 and hot top platen 16. Conveyor belt 12 accepts bun B anti carries bun B through griller 10. Bun B is held in contact with platen 16 under variable tension by track support 14, to ensure proper grilling.
According to the present invention, top surface 18 of conveyor belt 12 is made of a high temperature, low friction surface such as polytetrafluoroethylene or silicone material. It is preferred that this surface be textured, having more friction than an untextured surface of the same material. Of the high temperature belts tested, the silicone material provided the best results. One, two, or a greater 3o number of parallel conveyor belts 12 can be used.
The present invention relates to a mechanized bun grilling device having a bun conveyor belt that does not mark the exterior of the buns during grilling.
In particular, it relates to a high temperature, solid weave non-stick conveyor belt for use in a conveyorized bun griller.
BACKGROUND OF THE INVENTION
to Contact toasting of buns has been offered to the commercial food service market for a number of years. The method of moving product in a conveyor across a hot surface to toast the product is referred to as conveyor bun grilling.
This grilling method requires the bun to be pressed against the hot surface as it is moved along the conveyor, to provide quick, even toasting.
Horizontal grillers having a heated bun discharge and holding area are known in the art. These grillers preferably utilize a spring tension track support to apply pressure to the bun, to ensure even and adequate grilling. However, grillers of this design have been subject to certain limitations. For example, while the spring tension track support provides a more uniform toasting of the cut side of the bun, by pressing the cut surface firmly and evenly against the grilling surface, it also leaves markings on the exterior of the bun. The pressure applied by the spring tension track support creates these markings on the rounded surface of the bun These markings can be considered to be aesthetically undesirable.
Accordingly, a conveyor bun griller is needed that can effectively grill the cut surfaces of a bun, without creating undesirable markings or impressions on the exterior of the bun.
CA 02319331 2000-10-04 ., Different wire type conveyor belts having tighter spacings were evaluated in attempting to reduce the incidence of bun marking. The belt with the tightest spacing tested was a wire mesh belt that was 90% closed. These wire mesh belts were heavy, however, which reduced the ability of the spring track to conform to the shape of the bun. Moreover, the metal conveyors continued to cause an impression or conveyor mark on the bun, and accordingly, were not satisfactory.
Next, attempts were made to cover the existing wire conveyor with a belt material. Due to the high operating temperature of the conveyor, a to polytetrafluoroethylene sheet material was selected. This material is also the preferred material for use on the hot top platen griller surface. While the results were positive -- the wire belt markings were eliminated - the smooth, slick surface of the polytetrafluoroethylene material caused problems with the feeding of the bun. Upon initial infeed, the bun would not enter the area between the upper hot t 5 platen and the lower conveyor belt without manual assistance. Once the bun was between the platen and conveyor, the bun would move, maintaining contact to toast when set at minimum pressure. However, as pressure would be applied to increase the toasting results, the compression would cause the bun to stall on the slick track surface.
Accordingly, a conveyor bun gciller is needed that can prevent markings on the exterior of the bun, while conveying the bun reliably, without catching or stalling. The goal is to maximize the initial pressure applied to the bun while the bun is most resilient ("preferably below about 1300F). This allows for maximum heat transfer. Once the bun absorbs heat the softened product will deform.
Thus, the compression by the belt is reduced at the end of the cycle.
SUMMARY OF THE INVENTION
3o The present invention provides a conveyor bun griller having a conveyor belt with a textured low-friction surface with thermally conductive properties. This surface has more friction than as untextured low-friction surface, thus permitting the buns to be grilled without aesthetically undesirable markings, but also without creating handling problems for users of the griller.
Figure 1 is a side view of a preferred conveyor bun griller of the present invention;
Figure 2 is a cross section of a conveyor belt track of the griller of Figure 1;
and Figure 3 is a partial cross section of an alternate embodiment conveyor belt according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A preferred conveyor bun griller 10 is depicted in Figure 1. Griller 10 2o includes conveyor belt 12, seated between spring tension track support 14 and hot top platen 16. Conveyor belt 12 accepts bun B anti carries bun B through griller 10. Bun B is held in contact with platen 16 under variable tension by track support 14, to ensure proper grilling.
According to the present invention, top surface 18 of conveyor belt 12 is made of a high temperature, low friction surface such as polytetrafluoroethylene or silicone material. It is preferred that this surface be textured, having more friction than an untextured surface of the same material. Of the high temperature belts tested, the silicone material provided the best results. One, two, or a greater 3o number of parallel conveyor belts 12 can be used.
-. CA 02319331 2000-10-04 In one embodiment, a conventional metal conveyor belt can be overlaid with a high temperature belt. This dual system is less preferred, however, because it increases the cost and complexity of griller 10. Accordingly, as depicted in Figure 1, a preferred griller 10 according to the present invention includes a conveyor belt 12 formed of a solid weave of low-friction, high temperature material such as polytetrafluoroethylene or silicone material. In a most preferred embodiment, the lower belt is made of a silicone material. This silicone material has increased friction, providing the optimal means of transferring the bun, in addition to adding heat to the bun product. The weave of the material provides 1 o some friction, to enable the conveyor belt 12 to accept and convey bun B
reliably through griller 10. A moderate amount of friction can also be provided to conveyor belt 12 through patterning and other texturizing methods. However, it is important that the texture not be so extreme as to create markings on the surface of bun B.
These markings can cause bun B to have an overly crusty baked surface on its crown and heel.
The solid weave low-fiiction conveyor belt 12 must thus preferably be operated without a metal conveyor belt. This presents a need for a drive system that can move the conveyor belt 12, without the advantages of metal gear teeth mating into a metal conveyor. The grillers 10 of the present invention having a low-friction belt only, without a metal conveyor, are preferably driven by pinch rollers 20 and 22. The conveyor belt 12 is formed into an endless loop, which runs between first and second pinch rollers 20 and 22. First pinch roller 20 tunas as the drive roller, while second pinch roller 22, under tension, maintains pressure between conveyor belt 12 and first pinch roller 20. This drive method allows the conveyor belt 12 to operate loosely over the track support 14. Allowing conveyor belt 12 to operate over track support 14 in this manner causes the conveyor belt 12 to conform to the shape of bun B, thus improving the appearance and taste of the final product.
reliably through griller 10. A moderate amount of friction can also be provided to conveyor belt 12 through patterning and other texturizing methods. However, it is important that the texture not be so extreme as to create markings on the surface of bun B.
These markings can cause bun B to have an overly crusty baked surface on its crown and heel.
The solid weave low-fiiction conveyor belt 12 must thus preferably be operated without a metal conveyor belt. This presents a need for a drive system that can move the conveyor belt 12, without the advantages of metal gear teeth mating into a metal conveyor. The grillers 10 of the present invention having a low-friction belt only, without a metal conveyor, are preferably driven by pinch rollers 20 and 22. The conveyor belt 12 is formed into an endless loop, which runs between first and second pinch rollers 20 and 22. First pinch roller 20 tunas as the drive roller, while second pinch roller 22, under tension, maintains pressure between conveyor belt 12 and first pinch roller 20. This drive method allows the conveyor belt 12 to operate loosely over the track support 14. Allowing conveyor belt 12 to operate over track support 14 in this manner causes the conveyor belt 12 to conform to the shape of bun B, thus improving the appearance and taste of the final product.
.- CA 02319331 2000-10-04 As shown in Figure 2, track support 14 preferably includes track support crown 30 supported by leaf spring 32. Leaf spring 32 is in turn supported by vertical guide pin 34. In addition (see Figure 1 ), griller 10 is preferably provided with a top platen 16 having a handle 48 and a hinge 50 to allow top platen 16 to be lifted away from conveyor belt 12. This permits the area of conveyor belt 12 to be accessed for cleaning or bun retrieval.
The bun B, having passed on conveyor belt 12 through griller 10 preferably for about 30 to 35 seconds), drops into holding area 24. The toasted bun B has a 1o preferred internal temperature of about 158 to 1700F, at the middle, or centroid, of bun B. In holding area 24, bun B must hold for up to about 5 minutes with a desirable texture (no surface hardening) and a minimum temperature of about 1400F. To facilitate this, holding area 24 includes a water pan 26, preferably a stationary pan with a drain (not shown), Water pan 26 provides a humidified 15 environment within holding area 24, to maintain bun B at near-optimal condition.
Water pan 26 can be heated by heater 28 to rapidly humidify holding area 24.
Water pan 26 can also be removable, in which case a drain would not be necessary.
Holding area 24 can be enclosed with a translucent vertical strips 25 to act as an air block door to reduce the effects of ambient temperature and humidity on the 2o holding environment.
Although less preferred, the textured conveyor belt 12 can be used over a metal conveyor 36, as shown in Figure 3. This metal conveyor 36 preferably has coarse 5/8 inch cross wire spacing. In this embodiment, polytetrafluoroethylene 25 sleeve 38 is placed over metal conveyor 36, and is seamed onto and looped around two adjacent bars 40, 42 of metal conveyor 36. A loose flap or tab 43 of polytetrafluoroethylene can then be seamed to conveyor belt 12 over bars 40, 42 to protect the belt connection points. This construction permits retrofitted use of an existing metal conveyor 36, while allowing bars 40 and 42 to be engaged by teeth 30 44 of drive sprocket 46. The polytetrafluoroethylene can be a black material. As discussed above, even better performance can be achieved by replacing the s ~1 polytetrafluoroethylene material with a silicone belt material. This silicone belt material increases the friction on the bun, providing the necessary means to transfer the bun product. This silicone material also provides a thermal energy which aids in adding heat to the bun product.
The low friction textured surface belts may be any belt having the properties of a low friction and textured surface. For example, embodiments according to the invention may use either a silicone material belt or a polytetrafluoroethylene belt.
As another approach to overcoming excessive bun friction and providing improved bun transfer is to use two parallel belts, one top and one bottom.
The two belts are moved at the same speed in the same direction, carrying the buns between them. These belts are preferably of polytetrafluoroethylene or silicone i 5 material.
While I have shown and described several embodiments in accordance with my invention, it is to be clearly understood that the same are susceptible to numerous changes apparent to one skilled in the art. Therefore, I do not wish to be limited to the details shown and described but intend to cover all such changes and modifications.
The bun B, having passed on conveyor belt 12 through griller 10 preferably for about 30 to 35 seconds), drops into holding area 24. The toasted bun B has a 1o preferred internal temperature of about 158 to 1700F, at the middle, or centroid, of bun B. In holding area 24, bun B must hold for up to about 5 minutes with a desirable texture (no surface hardening) and a minimum temperature of about 1400F. To facilitate this, holding area 24 includes a water pan 26, preferably a stationary pan with a drain (not shown), Water pan 26 provides a humidified 15 environment within holding area 24, to maintain bun B at near-optimal condition.
Water pan 26 can be heated by heater 28 to rapidly humidify holding area 24.
Water pan 26 can also be removable, in which case a drain would not be necessary.
Holding area 24 can be enclosed with a translucent vertical strips 25 to act as an air block door to reduce the effects of ambient temperature and humidity on the 2o holding environment.
Although less preferred, the textured conveyor belt 12 can be used over a metal conveyor 36, as shown in Figure 3. This metal conveyor 36 preferably has coarse 5/8 inch cross wire spacing. In this embodiment, polytetrafluoroethylene 25 sleeve 38 is placed over metal conveyor 36, and is seamed onto and looped around two adjacent bars 40, 42 of metal conveyor 36. A loose flap or tab 43 of polytetrafluoroethylene can then be seamed to conveyor belt 12 over bars 40, 42 to protect the belt connection points. This construction permits retrofitted use of an existing metal conveyor 36, while allowing bars 40 and 42 to be engaged by teeth 30 44 of drive sprocket 46. The polytetrafluoroethylene can be a black material. As discussed above, even better performance can be achieved by replacing the s ~1 polytetrafluoroethylene material with a silicone belt material. This silicone belt material increases the friction on the bun, providing the necessary means to transfer the bun product. This silicone material also provides a thermal energy which aids in adding heat to the bun product.
The low friction textured surface belts may be any belt having the properties of a low friction and textured surface. For example, embodiments according to the invention may use either a silicone material belt or a polytetrafluoroethylene belt.
As another approach to overcoming excessive bun friction and providing improved bun transfer is to use two parallel belts, one top and one bottom.
The two belts are moved at the same speed in the same direction, carrying the buns between them. These belts are preferably of polytetrafluoroethylene or silicone i 5 material.
While I have shown and described several embodiments in accordance with my invention, it is to be clearly understood that the same are susceptible to numerous changes apparent to one skilled in the art. Therefore, I do not wish to be limited to the details shown and described but intend to cover all such changes and modifications.
Claims (6)
1. A griller for grilling a bun, said griller comprising;
a platen; and a conveyor having a belt with a textured low friction surface that engages said bun and conveys said bun in contact with and along said platen to grill said bun.
a platen; and a conveyor having a belt with a textured low friction surface that engages said bun and conveys said bun in contact with and along said platen to grill said bun.
2. The griller according to claim 1, wherein said belt is made of silicone material.
3. The griller according to claim 1, wherein said belt is made of polytetrafluoroethylene material.
4. The griller according to claim 1, wherein said conveyor includes pinch roller means for moving said belt.
5. The griller according to claim 4, wherein said conveyor further includes a spring tension support for maintaining said belt in pressurized engagement with said bun, whereby said bun is held in contact with said platen under variable tension.
6. The griller according to claim 1, wherein said belt is mounted on a metal conveyor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6887997P | 1997-12-26 | 1997-12-26 | |
| US60/068,879 | 1997-12-26 | ||
| PCT/US1998/027349 WO1999033382A1 (en) | 1997-12-26 | 1998-12-23 | Conveyorized bun griller with non-marking belts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2319331A1 true CA2319331A1 (en) | 1999-07-08 |
Family
ID=22085299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002319331A Abandoned CA2319331A1 (en) | 1997-12-26 | 1998-12-23 | Conveyorized bun griller with non-marking belts |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1039823A4 (en) |
| AU (1) | AU1942899A (en) |
| CA (1) | CA2319331A1 (en) |
| WO (1) | WO1999033382A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10450141B2 (en) | 2016-11-29 | 2019-10-22 | Saint-Gobain Performance Plastics Corporation | Composite belt profile |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444094A (en) * | 1982-09-24 | 1984-04-24 | Taylor Freezer Company | Intermittent automatic grill for hamburger patties |
| US4523520A (en) * | 1984-01-17 | 1985-06-18 | North Side Packing Company | Meat processing equipment |
| US4701340A (en) * | 1985-12-09 | 1987-10-20 | Lincoln Foodservice Products, Inc. | Impingement and steam oven apparatus for preparing food products |
| GB2254247B (en) * | 1990-10-09 | 1994-03-09 | Gen Dispensing Syst | Infuser |
| US5044264A (en) * | 1991-01-28 | 1991-09-03 | Forney Robert B | Cooking apparatus for producing grill stripes on cooked products |
| FR2687299B1 (en) * | 1992-02-18 | 1995-05-19 | Seb Sa | TOASTER WITH INCLINED SCROLLING PLAN. |
| US5458051A (en) * | 1993-11-29 | 1995-10-17 | G. S. Blodgett Corporation | Belt cooking apparatus |
-
1998
- 1998-12-23 EP EP98964257A patent/EP1039823A4/en not_active Withdrawn
- 1998-12-23 WO PCT/US1998/027349 patent/WO1999033382A1/en not_active Application Discontinuation
- 1998-12-23 AU AU19428/99A patent/AU1942899A/en not_active Abandoned
- 1998-12-23 CA CA002319331A patent/CA2319331A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10450141B2 (en) | 2016-11-29 | 2019-10-22 | Saint-Gobain Performance Plastics Corporation | Composite belt profile |
| US10625943B2 (en) | 2016-11-29 | 2020-04-21 | Saint-Gobain Performance Plastics Corporation | Composite belt profile |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1039823A1 (en) | 2000-10-04 |
| EP1039823A4 (en) | 2001-03-14 |
| WO1999033382A1 (en) | 1999-07-08 |
| AU1942899A (en) | 1999-07-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |