# US 4,391,576 A · Rotary drum dough divider

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- Number: US 4,391,576 A
- Document ID: US4391576A
- Status: Granted
- Kind: A
- Application number: 06/334,766
- Filed: 1981-12-28
- Granted: 1983-07-05
- Earliest claimed: 1981-12-28
- Assignees: AMF Incorporated
- Inventors: Donald L. Cummins
- Web page: https://patentgrep.com/patent/US4391576A

## CPC

- A21C 5/04: with division boxes in a revolving body with radially-working pistons
- A21C: MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH

## Abstract

A rotating drum divider and an improved assembly for use in a cylinder of the rotating drum type dough divider comprising a sleeve positioned in the cylinder forming seals on both sides of a pair of diametrically opposed guide slots connected to atmosphere and a pair of ducts communicating with the cylinder at opposite ends of the sleeve which are alternately connected to pressure and vacuum, a double acting piston having a head in each end of the cylinder and a piston rod portion extending from each head into the sleeve, and a scaling rod joining the adjacent ends of the piston rod portions together, and reciprocating to cause the rod portions and their heads to reciprocate together in the cylinder as a double ended piston.

## Claims

### Claim 1

A piston assembly for a transverse through bore cylinder with diametrically opposed slots and a pair of ports each spaced outwardly from opposite ends of the slots in the drum of a rotary drum dough divider, comprising:
a sleeve removably fixed against movement relative a wall of said cylinder and equally spaced from the ends of said cylinder;
said sleeve having a pair of end walls engaging and forming with the wall of said cylinder a pair of axially spaced sealed interfaces each between opposite ends of the slots and a different one of the pair of ports;
a double ended piston having a rod extending through said sleeve and a head connected to each end of said rod to reciprocate in said cylinder between two terminal positions with one of said heads being flush with the surface of the drum in one terminal position and the other of said heads being flush with the surface of the drum in the other terminal position;
said piston rod being formed by two rod portions each being connected at one end to a different one of said heads; and
the adjacent ends of said rod portions being interfitted and connected together by means extending through said slots and being movable axially in said cylinder to reciprocate said piston.

### Claim 2 (depends on 1)

The piston assembly in accordance with claim 1, and
each head having a curved outer face conforming to the curvature of the drum.

### Claim 3 (depends on 2)

The piston assembly in accordance with claim 2, and
each head forming an open pocket as it moves away from the end of the cylinder for receiving a predetermined amount of dough and for discharging said dough from said pocket as said head moves toward the end of said cylinder.

### Claim 4 (depends on 3)

The piston assembly in accordance with claim 3, and
the area between the end of said sleeve and the piston head adjacent thereto being connected to vacuum as said head moves toward said sleeve and to pressure as said head moves toward the cylinder end thereby providing forces to assist said piston to reciprocate.

### Claim 5 (depends on 4)

The piston assembly in accordance with claim 4, and
each head having axially extending peripheral grooves connecting vacuum to the bottom of a pocket being formed to prevent voids and connecting pressure to the front of the head moving toward the cylinder end thereby aiding in discharging dough.

### Claim 6

Apparatus for providing volumetrically equal dough pieces comprising:
a hopper for dough to be divided and a discharge for volumetrically equal dough pieces;
a rotating drum having a plurality of transverse through bores forming parallel cylinders providing pockets at one of their corresponding ends receiving dough from said hopper and simultaneously discharging volumetrically equal dough pieces from their other corresponding ends;
a scaling rod extending axially in said drum and transversely through all of said cylinders;
a path along the center of rotation of said drum providing a pair of diametrically opposed guide slots in the wall of each of said cylinders for said scaling rod;
a plurality of sleeves each removably fixed in a different one of said cylinders equally spaced from the ends thereof;
each of said sleeves having a pair of axially spaced end walls engaging and forming sealed interfaces with the wall of a cylinder at opposite ends of a pair of guide slots, and a pair of diametrically opposed slots between said end walls being aligned with said guide slots;
means communicating with said cylinders at opposite ends of said sleeves alternately and oppositely providing pressure and vacuum;
a plurality of pistons each having a rod extending axially through a different one of said sleeves and having a head connected to each end of said rod;
said scaling rod engaging said piston rods and causing said pistons to reciprocate in unison between a first terminal position in which one of the corresponding heads of said pistons are flush with said drum and a second terminal position in which the other of the corresponding heads are flush with said drum.

### Claim 7 (depends on 6)

The apparatus in accordance with claim 6, and
each of said piston rods being formed by two rod portions each being connected at one end to a different one of said heads; and
the adjacent ends of said rod portions being interfitted and connected together by said scaling rod.

### Claim 8 (depends on 7)

The apparatus in accordance with claim 7, and
each of said heads having a curved outer face conforming to the curvature of the drum.

### Claim 9 (depends on 8)

The piston assembly in accordance with claim 8, and
each of said heads forming an open pocket as it moves away from the end of a cylinder for receiving a predetermined amount of dough and for discharging said dough from said pocket as said head moves toward the end of said cylinder.

### Claim 10 (depends on 9)

The apparatus in accordance with claim 9, and
the area between the end of each of said sleeves and the piston head adjacent thereto being connected to vacuum as said head moves toward said sleeve and to pressure as said head moves toward the cylinder end thereby providing forces to assist said piston to reciprocate.

### Claim 11 (depends on 10)

The apparatus in accordance with claim 10, and
each of said heads having axially extending peripheral grooves connecting vacuum to the bottom of a pocket being formed to prevent voids and connecting pressure to the front of the head moving toward the cylinder end thereby aiding in discharging dough.