Apparatus for cutting and stacking a multi-form web

• US 5,348,527 A
• Filed: 08/11/1993
• Issued: 09/20/1994
• Est. Priority Date: 09/01/1992
• Status: Expired due to Fees

• Current Assignee: RDP Marathon, Inc. (Barry-Wehmiller Group Incorporated)
• Original Assignee: RDP Marathon, Inc. (Barry-Wehmiller Group Incorporated)
• Inventors: Beckwith, Glenn
• Primary Examiner(s): Lavinder, Jack W.
• Application Number:
  US08/104,797
• Time in Patent Office: 405 Days
• Field of Search: 493/411, 493/412, 493/413, 493/414, 493/415
• US Class Current: 493/413
• CPC Class Codes: B65H 31/32 Auxiliary devices for receiving articles during removal of a completed pile
• CPC Class Codes: B65H 45/20 Zig-zag folders B65H45/228 takes precedence
• CPC Class Codes: Y10T 83/4702 With slitter
• CPC Class Codes: Y10T 83/4711 With means to produce "mis-cut"
• CPC Class Codes: Y10T 83/4833 Cooperating tool axes adjustable relative to each other
• CPC Class Codes: Y10T 83/4838 With anvil backup
• CPC Class Codes: Y10T 83/8745 Tool and anvil relatively positionable

Abstract

A high speed rotary cutter assembly for transversely cutting a moving web, comprising a cutting roll and an anvil roll rotating at web speed which are selectively movable toward and away from one another to set the rotary cutter assembly in operative and idle modes, respectively. The invention also extends to a web handling device for forming a continuous multi-form web into a stack, comprising a folder assembly laying successive forms of the web in a superposed relationship on a table to form a stack. A temporary stack support assembly is extended along an arcuate descending path between the folder assembly and the table when the stack is completed for temporarily holding the incoming folded product until the completed stack on the table has been ejected.

Claims

1. A web handling device for forming a continuous multi-form web into a stack, said web handling device comprising:

a folder assembly for laying successive forms of the web in a superposed relationship to form a stack;

a table beneath said folder assembly for receiving and supporting the stack, said table being movable away from said folder assembly at a speed correlated to a build-up rate of the stack in order to prevent a top of the stack from interfering with said folder assembly;

a temporary stack support assembly capable of moving with relation to said table between extended and retracted positions, in said extended position said temporary stack support assembly extending between said folder assembly and said table, whereby successive forms of the web are laid in a superposed relationship on said temporary stack support assembly, in said retracted position said temporary stack support assembly being in a spaced apart relationship with said table to allow said folder assembly to lay the web in a folded condition on said table, said temporary stack support assembly being movable toward said extended position along a descending path; and

a stack ejector operating in a timed relationship with said folder assembly for ejecting from said table a completed stack of forms when said temporary stack support assembly is in said extended position.

2. A web handling device as defined in claim 1, wherein said temporary stack support assembly is movable toward said extended position along an arcuate descending path.

3. A web handling device as defined in claim 1, wherein said temporary stack support assembly is movable toward said retracted position along a generally straight path.

4. A web handling device as defined in claim 1, wherein said temporary stack support assembly comprises a plurality of fingers in a spaced apart relationship forming a support surface which moves between said extended and retracted positions.

5. A web handling device as defined in claim 4, wherein said folder assembly includes a plurality of knockdown rollers for positively folding said web transversely between adjacent forms, said knockdown rollers being in a spaced apart relationship and defining therebetween spaces, said fingers being in registration with respective spaces, thereby allowing said fingers to move between said knockdown rollers when said support surface moves between said extended and retracted positions.

6. A web handling device as defined in claim 4, wherein said temporary stack support assembly comprises a drive for selectively moving said support surface between said extended and retracted positions.

7. A web handling device as defined in claim 6, wherein said drive comprises;

a rotary cam;

a linkage connecting said rotary cam to said support surface, rotation of said rotary cam varying an inclination of said support surface while said support surface advances toward said extended position.

8. A web handling device as defined in claim 1, wherein said table comprises a plurality of support fingers in a spaced apart relationship defining therebetween elongated spaces.

9. A web handling device as defined in claim 8, wherein said stack ejector comprises a plurality of ejector fingers in a spaced apart relationship in registration with respective elongated spaces of said table, whereby said ejector fingers are capable of moving between said support fingers for ejecting a completed stack from said table.

10. A web handling device as defined in claim 8, wherein said stack ejector comprises an actuator coupled to said ejector fingers for selectively moving said ejector fingers across said table in order to eject a completed stack from said table.