AU611574B2 - Bread moulders - Google Patents

Description

6f"11574 COMIMONWEALTH OF AUSTRALIA Patents Act 1952

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Name of Applicant Addres.s of Applicant Actual Inventor(s) Address for Service APV BAKER PTY LTD Cook Road, Mitcham, Victoria, 3132, Australia Paul Eaton WILLETT GRANT ADAMS COMPANY, Patent Trade Mark Attorneys, 333 Adelaide Street, BRISBANE. QUEENSLAND. 4000

AUSTRALIA.

COMPLETE SPECIFICATION FOR THE INVENTION ENTITLED: "BREAD MOULDERS" The following statemer~t is a tull description of the invention including the best method of performing it known to the applicant.

TO: The Commissioner of Patents, COMMONWEALTH OF AUSTRALIA.

THIS INVENTION relates to bread moulders.

The specification of Australian Patent No.

548,075 describes and illustrated a bread moulder of the type made and arranged to work dough between convergent runs of driven endless roller-mounted upper anr 1 lower belts, and incorporating an adjustable dough shaping device for restricting the length of a dough piece and also having, as an additional fixture, a divider which may be installed when required to divide the worked dough piece into several portions before it is discharged. This divider includes a sole plate which lies upon the lower belt run and blades extending perpendicularly from the sole plate towards the upper S" belt run. A disadvantage of such a divider is that tue 15 baker iay inadvertently so adjust the relationship of the belts that the blades contact and damage the upper belt.

It is an object of the present invention to provide a bread moulder capable of dividing worked dough 20 into sections but obviating the said present 0 disadvantage.

With the foregoing and other objects in view, the invention resides broadly, in a bread moulder of the type made and arranged to work dough pieces between con-ergent runs of driven endless roller-mounted upper and lower belts wherein the rollers of the lower belt are carried by a belt adjustment frame; adjustment means are provided for moving the belt adjustment frame and the lower belt towards or from the upper belt; a delivery plate mounted on the belt adjustment frame extends below the upper belt and receive and deliver a dough piece worked between the two belts; and a series of spaced parallel splitter blades are mounted for movement to advance them in unison through divisions in the delivery plate parallel to the direction of motion of a dough piece moving over the delivery plate or to retract them therefrom, the splitter blades when advanced dividing the dough piece into sections. Other features of the invention will become apparent from the following description.

A preferred embodiment of the invention is shown in the accompanying drawings wherein: FIG. 1 is a perspective view of a bread *~'oulder according to the invention; FIG. 2 is a sectional view of the major part of the bread moulder shown in FIG. 1; FIG. 3 is an elevational view of one side of the bread moulder, a side cover plate of the main casing being removed, oFIG. 4 is a similar view of the other side of 15 the bread moulder, the other side cover plate being o* o removed, and FIG. 5 is a perspective detail view of the splitter blade assembly of the bread moulder.

The bread moulder illustrated has a main 20 housing 10 fixed on a stand 1ii which is mounted on castor wheels 12 and furnished with racks 13 to carry baker's trays which can be loaded with products to be baked.

The main housing includes a pair of rigidly interconnected side plates 14 and 15 which have outturned peripheral flanges 16 to which are fixed side cover plates 17 to form side enclosures or housing 18 and 19. Front and top panels indicated at 20 and 21 respectively are fixed between the side plates 14 and An electric motor 22 is mounted within the main housing 10 and through various drives hereinafter described drives the several moving parts of the bread moulder. A front casing 23 is fixed centrally to the front and top panels 20 and 21 of the main housing H i -i i Goes 0600

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direct them between a pair of counter-rotating sheeting rollers 25 and 26.

The feed chute 24 is normally closed by a hinged shutter 27 pivotally mounted on a transverse shaft 28 and biased to its closed position by a torsion spr:ng (not shown). A pair of parallel guide rollers 29 normally lie close to the shutter 27 to either side of its middle part. The shafts of the guide rollers 29 are fixed to a plate 30 hinged on top of the front casing 23 and can be raised hingedly clear of the shutter.

Fixed to the shaft 29 is a safety gate 31 consisting of a double or V-shaped grille, normally spring-biased to its upright position as shown, but capable of being swung down by handles 32 on the shaft 15 28.

A dough piece to be worked in the bread moulder and of a size suitable for a bread loaf may be thrown onto the shutter 27 between the guide rollers 29, causing the shutter to swing to an open position so that the dough piece will pass through the chute 24 to the counter-rotating sheeting rollers 25 and 26. If the dough piece should stick to the chute or otherwise fail to enter between the sheeting rollers, the safety gate 31 may be swung down by means of either handle 32, 25 clearing the guide rollers 2. The leading part of the grille moves the shutter to sweep the dough piece to the feed rollers, the trailing section of the grille forming a barrier to prevent the baker from inserting his hand into the chute and possibly having it caught between the sheeting rollers.

If smaller douyh pieces are to be worked for making bread rolls, for example, two such pieces at a time may be fed through openings 33 at both sides of the hunged shutter 27 and again if either should stick it can be cleared by operation of the safety gate.

4 L. 2 1 If dough pieces are to be worked to make shell rolls, two elongated fingers of dough at a time are inserted through shell roll tubes 34 held removably in sleeves 35 fixed in holes at the sides of the top of the front casing 23 and leading vertically down to the sheeting rollers 25 and 26.

Each of the sheeting rollers 25 and 26 is surfaced with rubber or the like. The front sheeting roller 25, of greater diameter than the rear roller, has a shaft 36 rotatable in bearings in blocks 37 bolted to the outer faces of the main casing side plates 14 and 999. 15. Pivoted to these fixed blocks at 38 are a pair of ,hinged blocks 39 which carry the bearings for the shaft 40 of the rear and upper sheeting roller 26. A shaft 41 15 through both side plates 14 and 15 carries at each end a lever arm 42 connected by a J-shaped bar 43 to a hinged block 39. Within the side enclosure 18 a bifurcated lever 44 fixed on the shaft 41 carries between its arms an end of a hand-lever 45 extending through and spring- "9'9 20 loaded into engagement with a rack 46 at one side of the front of the dough moulder main casing 10. By means of the hand-lever 45 the two hinged blocks 39 may be moved in unison to move the sheeting roller 26 closer to or further from the sheeting roller 25, to adjust the thickness to which a dough piece will be pressed when passed between the two rollers.

Fixed to the two hinged blocks 39 are the ends of a transverse bar 47 movable, when the hinged blocks are pivoted, in arcuate slots 48 in the side plates 14 and 15. Between the side plates the bar 47 carries a scraper blade 49 bearing against the roller 26 to ensure that dough is parted from this roller and will fall into a felt covered endless top belt 50 carried by a large drive or front roller 51 and a smaller idler or rear roller 52. The dough piece received on the top run of the top belt 50 is carried, in the d, 7ction indicated by an arrow in FIG. 2, under a curling chain 53 consisting of a flexible section of chain-woven metal fabric fixed at its front to a transverse bar 54 and at its rear to a transverse bar 55 tensioned by springs 56.

The dough piece is rolled between the rearwardly and upwardly moving belt 50 and the curling chain 53 and is fed over the top of the belt down onto the rear upper part of the top run of a lower belt 57. The dough piece travels forwardly and downwardly between the top run of the lower belt and the bottom run of the top belt.

These runs are downwardly and forwardly convergent and, as indicated by arrows in FIG. 2, they move in opposite oo "directions. The top belt is driven faster than the lower belt, and so the dough piece, rolled rapidly and I 15 progressively compressed, proceeds downwardly and forwardly.

The lower belt 57 is carried by a lower or drive roller 58 and an upper or idler roller 59, the shafts 60 and 61 of which are carried by a belt 20 adjustment frame indicated generally at 62. This frame includes parallel side pieces 63 with bearings for the shafts and interconnected at the front by a curved delivery plate 64. Lugs 65 extending from the upper and lower parts of each side plate 63 are pivoted to corresponding arms of bell cranks 66 fixed on upper and lower transverse shafts 67 and 68 respectively and other arms of the bell cranks being connected by connecting |i rods 69. Within the side enclosure 18 (see FIG. 3) I' there is fixed to an end of the lower shaft 68 a block 70 to which are pivoted and spring loaded the ends of a bifurcated lever 71 from the upper end of which a hand lever 72 passes through and is spring-loaded into engagement with a rack 73 in a flange 16 of the main casing 10. By operation of this hand lever, the shaft 68 may be turned in one direction o. the other to act, through the bell cranks 6v and connecting rods 69, to I

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cause the belt adjustment frame 62 and the lower belt 59 to move in parallelism towards or away from the upper belt As shown in FIG. 4, the shaft 74 of the motor 22 carries a pulley wheel 75 which through a belt 76 drives a large pulley wheel 77 on the shaft 78 of which is a sprocket (not shown) engaging an endless chain 79 driving an idler sprocket 80; sprockets 81 and 82 on the shafts 40 and 36 of sheeting rollers 26 and 25; a sprocket 83 on the shaft 84 of the top belt drive roller 51; an idler pulley 85; a sprocket 86 on the shaft 60 of the lower belt drive roller 58, this shaft 60 passing through a slotted or oversize hole (not shown) in the side plate 15; and an idler sprocket 87 on a pivoted arm 15 88 acted on by a tension spring 89.

The bread moulder incorporates a dough shaping device for limiting the extent to which a dough piece, rolled and compressed between the upper and lower belts and 57, is permitted to lengthen. The cylindrical 20 ends of an otherwise square-section shaft 90 are rotatable in bearings in the upper ends of a pair of standards 91 fixed to the inner faces of the side plates 14 and 15. A lift frame 92 has its front fixed on the shaft 90, and through the rear of this frame is a rod 93 on which are slidable a pair of sleeves 94, each formed integrally with a shaping side arm 95. A lever 96 fulcrumed on the lift frame 92 and spring-loaded into engagement with a rack 97 on this frame is connected by connecting rods 98 to the two sleeves 94 so that, by varying the position of the lever 96, the sleeves 94, and the shaping side arms 95, may be brought closer or further apart. When the dough shaping device is not required for use, a lift lever 99 pivoted on the shaft may be swung down and engaged releasably with a catch 100 on a standard 91, causing the lift frame to lift the shaping side arms 95 clear of the dough moulder belts i .i u_ iand 57. When the shaping device is to be used, the lever 99 is released from the catch 100 and is raised so that the shaping side arms 95 are lowered to enter the space between the belts 50 and 57. Each of the shaping side arms 95 has extending outwardly from a position near to its distal end a shaft 101 carrying a roller 102 to contact the belts 50 and 57 and keep the shaping side arm just clear of both belts. The upper parts of the two shaping side arms are downwardly convergent; their middle parts are substantially parallel; and their lowermost parts are divergent. Lead-in plates 103 are provided on the upper parts of the shaping side arms to ensure that a. dough piece discharged over the rear of ooo* the top belt 50 will be received between the two shaping 15 side arms.

It is of course important that the shaping side arms should not be introduced between the belts and 57 while these belts are too close to accommodate them and that, while the shaping side arms are in place, 20 the lower belt 57 should not be inadvertently advanced S. towards the top belt 50. In either case the belts could be damaged by the shaping side arms. To avoid these possibilities, safety switches 104 and 105 are provided in the side enclosure 14 as shown in FIG. 3, and are connected in the circuit of the motor 22. A rod 106 depends from a lug 107 fixed on the square-section bar and has its lower end fixed to a switch actuator 108.

When the lift lever 99 is disengaged from the catch 100 and raised to lower the shaping side arms 95 into operative position as shown in FIGS. 1 and 2, the switch actuator 108 is lowered clear of the safety switch 104 which is opened. This will bring the motor 22 to rest, unless the bifurcated lever 71 has already been moved to such a position that a switch actuator 109 on an arm 110 extending from the lever 71 is coacting with and closing the safety switch 105. Therefore if the belts 50 and 57 8

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are not appropriately spaced, the motor 22 is automatically stopped when the lowering of the shaping side arms 95 commences; and if, while the moulder is operating with the shaping side arms in operative position, the lever 71 is moved to vary the spacing between the belts 50 and 57, the motor will again be instantly stopped and the belts brought to rest.

It is often required that a dough piece worked between the belts 50 and 57, its length restricted by the shaping side arms 95, should be divided into (normally) four substantially equal pieces, for the purpose of four-piece or cross-grain moulding of a bread loaf. For this purpose, the machine includes three similar and para)Tol splitter blades 111. These blades 15 are removably mounted on three blade carriers 112 fixed upon a transverse bar 113, its ends passing through slotted holes 114 near to the bottom of the side plates 14 and 15 and being fixed to the lower extremities of Ishaped arms 115 of which the upper ends are pivoted, at 20 116, near to the upper rear parts of the side plates. A transverse shaft 117 rotatable in bearings in the side plates 14 and 15 has fixed fo its ends a pair of parallel levers 118 and 119, each connected by a connecting rod 120 to the extremity of an L-shaped arm 115. From the lever 118 there extends a handle 121 which is spring-loaded into engagement with a rack 122 in a flange 16 at the lower front part of the casing The handle may be operated to rotate the shaft 117 to act, through the levers 118 and 119 and the connecting rods 220 so to swing the L-shaped arms 115 that the splitter blades 1 are caused to advance substantially in parallelism from their normal inoperative position shown in FIG. 2 to their operative position shown in broken outline, passing closely through parallel slots 123 formed in the curved delivery plate 64. The leading edges of the splitter plates are sharpened, and are

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curved so that when fully advanced they are located clear of, but close to, the part of the belt 50 passing under the drive roller 51. Dough pieces which have been worked in the machine are discharged to the delivery plate 64 and travel gravitationally down a fixed ramp 124 onto a catch tray 125 extending from the front of the machine.

A safety bar 126 is provided at the front of the machine and, when pressed in an eiiergency acts through appropriate switching gear (not shown) to stop the motor 22.

It will be seen that the bread moulder is very 0900 0* 4P9 versatile in its operations, and can be used to produce 00*00 a full range of bread sticks, rolls, viennas and 4-piece 15 sandwich breads. With the shaping arms 95 lifted clear of the belts 50 and 57 the machine will work dough for making bread s .:icks or other breads not made in tins; when the latter are required the shaping arms 95, their spacing adjusted as required, are moved into position 20 between the belts. if the worked dough is to be divided 000 into sections f or the production of 4-piece sandwich breads, the splitter blades III are brought into their advanced position. With the shaping arms 95 lifted clear, dough pieces for bread rolls may be worked two at 2S a time by feeding them through the side openings 33 of the shutter 27. If dough is to be worked for making shell rolls, fingers of dough can be Inserted lengthwise two at a time through the shell roll tubes 34, to be rolled spirally. The provision of the shutter 27 and (330 the safety gate 31 very greatly reduces the likelihood of a baker suffering a severe accident from catching his hand between the sheeting rollers 25 and 26, and the provision of the safety switches 104 and 105 ensure that the belts will not be damaged by insertion of the shaping arms 95 while the belts are inappropriately

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spaced, or by incorrect adjustment of the belt relationship while the spacing arms are in place.

The particular embodiment of the invention herein described and illustrated may, of course, be subject to modifications of constructional detail and design within the scope and ambit of the invention hereinafter claimed.

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Claims (9)

1. A bread moulder of the type made and arranged to work dough pieces between convergent runs of driven endless upper and lower belts roller mounted within a housing wherein: the rollers of the lower belt are carried by a belt adjustment frame, adustment means are provided for moving the belt adjustment frame and the lower belt towards or from the upper belt, a delivery plate mounted on the belt adjustment frame extends below the upper belt to receive and deliver a dough piece worked between the two belt and 15 a series of spaced parallel splitter blades are mounted for movement to advance them in unison through divisions in the delivery plate parallel to the direction of motion of a dough piece moving over the delivery plate or to retract them therefrom, the 20 splitter blades when advanced dividing the moving dough piece into sections. 21 A bread moulder according to Claim I wherein the adjustment means includes: a hand lever on the housing, and linkage connecting the hand lever to thu belt adjustment frame such that the belt adjustment frame is movable in parallelism by means of the hand lever.

3. A bread moulder according to either of the Spreceding claims wherein: the splitter blades are mounted on a transverse bar in the housing, its ends fixed to the lower ends of a pair of lever arms the upper ends of which are fulcrumed to the housing sides, and a hand lever on the housing is connected by linkage to the transverse bar for advancing or 12 retracting the bar and the splitter blades mounted thereof.

4. A bread moulder according to any one of the preceding claims wherein: a pair of counter-rotatable sheeting rollers in the housing are aranged to feed dough pieces to the upper belt, the upper belt is arranged to carry the dough pieces under a curling chain and thence to the space between the upper and lower belts, one of the sheeting rollers is mounted on an axle the ends of which are rotatable in blocks at the csides of the housing, sheeting roller ajustment means are provided 15 for moving the blocks simultaneously to bring the S.sheeting roller carried thereby towards or from the other sheeting roller, and a scraper blade is mounted on the said blocks and in engagement with the sheeting roller carried by S 20 the blocks. A bread moulder according to claim 4 wherein: a feed chute on the housing is arranged to direct dough pieces fed thereinto between the sheeting rollers, and a shutter is spring-biased to close the feed chute and is yieldable to open position under impact of S a dough piece thrown thereonto.

6. A bread moulder according to Claim 5 wherein: a pair of parallel guide rollers flank the middle part of the shutter for guiding therebetween a dough piece thrown to the middle part of the shutter.

7. A bread moulder according to either of Claims or 6 werein the shutter is formed with openings at its sides to accept dough pieces which may be fed in pairs into the sides of the feed chute.

8. A bread moulder according to any one of Claims to 7 wherein: a safety gate is hinged to the feed chute and is movable by a handle to sweep any dough piece lodged in the feed chute therefrom to the sheeting rollers.

9. A bread moulder according to Claim 8 wherein: the safety gate is a double grille, V-shaped in end view, and of which, when the safety gate is moved the leading section sweeps any dough piece from the feed chute and the trailing section forms a barrier before the sheeting rollers. 1 10. A bread moulder according to any one of Claims 4 to 9 wherein: 15 a feed tube on the housing is made and arranged to accept an elongated finger of dough and direct it lengthwise between the sheeting rollers for the purpose hereinbefore set out.

11. A bread moulder according to any one of the 20 preceding claims wherein: a pair of side shaping arms depend from a transverse member mounted for movement to lower the said too arms into the space between the upper and lower belts or retract them thorefron the side i \Tarms being adapted to limit 1 "the lateral expansion of a dough piece worked between the belts, means being provided for simultaneous adjustment of the side shaping arms on the transverse Smember to ':ring them towards or from each other, means being provided for automatically interrupting the drive to the belts if the side shaping armis are lowered when the spacing between the belts is inappropriate and if the spacing between the belts is altered when the side shaping arms are interposed between them. V

12. A bread moulder substantially as herein described with reference to the accompanying drawings. DATED this eighth day of June 1989. APV BAKER PTY LTD By their Patent Attorneys GRANT ADAMS COMPANY. 0 0* S 0 10 0 1 St SO S S S S ~S .4) 55 S V ,a S S S~ 55 0 S 5* 55 1$ A