Reciprocating accumulation conveyor

• US 5,564,554 A
• Filed: 11/01/1994
• Issued: 10/15/1996
• Est. Priority Date: 11/01/1994
• Status: Expired due to Term

• Current Assignee: Lawrence Equipment Inc.
• Original Assignee: Lawrence Equipment Inc.
• Inventors: Lawrence, Eric C.
• Primary Examiner(s): Terrell, William E.
• Assistant Examiner(s): Kelly, Tamara
• Application Number:
  US08/333,001
• Time in Patent Office: 714 Days
• Field of Search: 198/431, 198/432, 198/418.6, 198/848
• US Class Current: 198/432
• CPC Class Codes: A21B 3/07 Charging or discharging ovens A21B3/18 takes precedence
• CPC Class Codes: B65G 21/14 to allow adjustment of length or configuration of load-carrier or traction element varying speed of conveyance by adjusting configuration of load-carrier B65G23/00; tensioning arrangements for belt or chain B65G23/44

Abstract

A reciprocating accumulation conveyor temporarily accumulates pressed tortillas delivered periodically from a press and delivers them onto an oven belt in a substantially continuous supply, thereby providing more uniform baking. The reciprocating accumulation conveyor has an accumulation belt which accelerates to match the speed of the press belt in the press, when the press belt moves periodically between pressing cycles, to accumulate the pressed batch of tortillas. The accumulation belt simultaneously extends partially over the prior batch moving onto the oven belt, and drops down behind the lasts row of the prior batch on the oven belt. The accumulation conveyor belt then advances at a delivery speed to transfer the tortillas onto the oven belt.

Claims

1. A reciprocating accumulation conveyor comprising:

a frame;

an armature longitudinally displaceable on the frame;

a nose bar lever pivotally attached to the armature;

a nose bar roller rotatably attached to ther nose bar lever;

a support roller rotatably supported on the armature;

first and second mobile rollers rotatably supported on the armature and spaced between the first and second mobile rollers and the nose bar roller;

a metal mesh accumulation belt supported by the nose bar roller and the support roller and around the first and second mobile rollers and the idler roller on the frame;

an armature actuator attached to the frame and the armature for advancing and retracting the armature; and

an accumulation belt driver for driving the accumulation belt.

2. The conveyor of claim 1 wherein the accumulation belt driver comprises a motor and overriding clutch.

3. The reciprocating accumulation conveyor of claim 1 further comprising a lower gear rack on the frame, an upper gear rack on the armature, and left and right pinion gears on the support roller, with the pinion gears enmeshed with the upper and lower gear racks.

4. The reciprocating accumulation conveyor of claim 3 wherein the nose bar lever is attached onto the upper gear rack.

5. The reciprocating accumulation conveyor of claim 1 further comprising a food press having a press belt, and an overriding clutch linked to the press belt and the accumulation belt driver.

6. The reciprocating accumulation conveyor of claim 1 further comprising a transfer belt for receiving a food product directly from the accumulation belt, with the transfer belt fixed in position relative to the frame.