Rotary cutter for scoring dough sheets

A plurality of cruciform cutter members are arranged on a drum to define transverse and circumferential lines along which dough sheet scoring is effected. The members are formed with dough scoring edges along each of the arms thereof and a cutting element at the center to cut a piece from the dough sheet at each intersection of the scoring lines. Air passageways leading to the cutting elements are alternately connected to a vacuum source for removing the cut dough piece from the dough sheet and to a pressure source for removing to dough piece from the element.

BACKGROUND OF THE INVENTION 
The present invention relates to apparatus for cutting and scoring a dough 
sheet to separate the dough sheet into a plurality of individual biscuits, 
crackers, or the like. More particularly, this invention relates to 
rotating cylindrical cutters designed to act upon a constantly advancing 
sheet of dough that is moving beneath the cutter by a fabric conveyor 
belt. 
Rotary cutters for this purpose are formed with scoring members arranged on 
the surface of a drum to divide the surface into a plurality of areas, 
each having the size and shape of a single biscuit or cracker. The dough 
sheet passing under the cutter is partially severed by the scoring members 
to mark out on the sheet many biscuit sized pieces. After the sheet of 
dough is baked, the baked sheet is broken along the score lines to produce 
the individual biscuits. 
The biscuits, crackers, etc. produced with the use of such apparatus have 
been rectangular with sharp corners. Rotary cutters which are used for 
this shape biscuit are shown in U.S. Pat. Nos. 2,887,964 and 3,880,030. 
SUMMARY OF THE INVENTION 
It is an object of the present invention to provide a rotary cutter for 
producing biscuits, crackers, and the like, having a configuration 
requiring the removal of dough. 
It is another object of the present invention to provide such a cutter for 
producing rectangular baked goods having clipped corners. 
The foregoing object is accomplished by providing a rotary cutter assembly 
comprising a drum with a plurality of cruciform shaped members arranged on 
the face of the drum, the members having dough scoring arms positioned 
along intersecting lines and center portions formed to cut out dough 
pieces at the intersections of said lines, and means for alternately 
connecting vacuum and pressure to the center portions to remove the dough 
pieces from the dough sheet.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to the drawings in detail, there is shown a rotary cutter 
assembly 10 according to the present invention which, as shown in FIGS. 
1-3, operates upon a continuous dough sheet S. The dough sheet transported 
upon a fabric conveyor belt 11 which passes between the cutter assembly 
and a rubber surfaced backup roll 12. 
The assembly 10 generally includes a cylindrical drum 14 mounted on a 
driven shaft 15, a stationary manifold plate 16 on one end of the drum 14, 
a plurality of cruciform dough scoring and cutting elements 17 positioned 
on the surface of the drum, and a plurality of docker blocks 19 holding 
the elements 17 in place. 
As particularly shown in FIGS. 2-5, the drum 14 is provided with a 
plurality of equally spaced bores 20 extending parallel to the axis of the 
drum. The bores extend from the manifold plate 16 and terminate short of 
the opposite end of the drum as shown in FIG. 4. Along each bore 20 is 
provided a plurality of spaced radially oriented passageways 21 extending 
outwardly from the bore 20 to a tapered port 22 in the surface of the drum 
14. 
The cruciform members 17, which are shown in detail in FIGS. 10-14, are 
formed with four arms and a center portion 24. Two arms 25 extend in 
opposite directions from the center portion 24, and as shown in FIG. 11, 
curve to extend circumferentially along the surface of drum 14. The other 
two arms 26 are at right angles to the arms 25 and are shaped to extend 
longitudinally along the surface of the drum. 
The arms 25 and 26 respectively have base flanges 27 and 29 and upright 
ridge portions 30 and 31 which taper to serrated scoring edges 32 and 34. 
The central portion 24 is formed with a diamond shaped recess 35 surrounded 
by a dough cutting edge 36. Parallel passageways 37 extend from the 
corners and center of the floor of the recess 35 through the base of the 
portion 24. 
As shown best in FIGS. 1 and 6, the cruciform members 17 are positioned on 
the surface of the drum with the passageways 37 positioned over the ports 
22, the arms 25 aligned to to form circumferential scoring lines, and the 
arms 26 aligned to define transverse scoring lines. 
The docker blocks 19, shown in FIGS. 8 and 9, are curved to match the 
contour of the drum and are formed with notches 39 running along each edge 
thereof to mate with the flanges 26 and 29 of the cruciform members. The 
docker blocks are formed with a plurality of countersunk holes 40 for 
accepting docker pins 41, and two countersunk holes 42 for receiving 
mounting screws 44. 
Referring to FIGS. 1, 4 and 5, the manifold plate 16 is annular and is 
mounted on a neck 45 extending from the drum 14. The end of the drum is 
formed with an annular recess 46 in which the plate 16 is seated. The 
plate 16 is held against the face 47 of the recess by a collar 49 mounted 
on the end of the neck 45 by machine screws 50. The manifold plate 16 is 
formed with a long arcuate vacuum port 51 and a shorter arcuate pressure 
port 52. As best shown in FIG. 5, the arcuate ports are aligned with the 
open ends of the bores 20 to sequentially place the bores in communication 
with the ports as the drum 14 rotates. A vacuum hose 54 (FIG. 1) is 
connected to the port 51 by means of a fitting 55 threaded into a bore 56 
provided in the plate 16. A pressure hose 57 is similarly connected to the 
port 52 through a fitting 58 and a bore 59 (FIG. 4) in the plate 16. 
Referring to FIG. 1, the shaft 15 is driven through a gear 60 and is 
journaled at its ends in resiliently mounted frame members 61 and 62. The 
plate 16 is held against rotation by the interaction of a manifold lock 
member 64 and a transverse frame member 65 (FIGS. 1 and 17). The lock 64 
is bolted to the manifold plate 16 and is formed with a recess 66 which 
slideably engages the frame member 65. 
As shown in FIG. 17, a scrap return conveyor 67 is positioned along the 
length of the cutter 10 above and at right angles to the conveyor belt 11. 
A deflector plate 69 extends along the side of the conveyor furthest from 
the cutter 10 and a scrap guide plate 70 is place between the conveyor 67 
and the face of the cutter. 
In operation, the drum 14 of the assembly 10 is driven through the gear 60 
as the dough sheet S is carried on the conveyor belt 11 between the drum 
14 and the backup roll 12. The peripheral speed of the drum is matched to 
the linear speed of the dough sheet. The rotation of the drum brings each 
row of cruciform elements sequentially into contact with the moving dough 
sheet to produce a continuous pattern in the dough sheet. Each of the 
scoring edges 32 and 34 of the cruciform elements outline the crackers as 
they are pressed into the dough sheet. 
As the centers 24 of the cruciform elements 10 are pressed into the dough 
sheet, the cutting edges 36 thereof cut out diamond shaped dough pieces at 
the intersections of the edge lines of the crackers. As the dough pieces 
are cut, the open end of the bore 20 associated with the that row of 
cruciform elements is placed in alignment with the arcuate vacuum port 51 
(FIG. 5). The vacuum is communicated through the bore 20, the passageways 
21, the ports 22, and the passageways 37, into the recesses 35. The cut 
dough pieces are thereby held within the recesses by the vacuum until the 
rotation of the drum brings those recesses to a position where the dough 
pieces are held in place by gravity. 
The continued rotation of the drum brings the end of each bore 20 into 
alignment with the arcuate pressure port 52. Compressed air is then 
introduced into the bore and the dough pieces are blown from the recesses 
onto the scrap return conveyor. 
The dough sheet is passed through a band oven and is broken along the score 
lines after baking to form the individual crackers. 
It will be seen from the foregoing that the present invention provides a 
rotary cutter for producing biscuits, crackers, and the like, having a 
configuration requiring removal of a dough piece from the dough sheet, 
such as rectangular baked goods having clipped corners.