Sheet separating apparatus

• US 4,618,085 A
• Filed: 06/29/1984
• Issued: 10/21/1986
• Est. Priority Date: 06/30/1983
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Urushihara, Toshio, Kimura, Tokuji
• Primary Examiner(s): YOST, FRANK
• Application Number:
  US06/626,389
• Time in Patent Office: 844 Days
• Field of Search: 225/100, 225/2, 225/4, 225/98, 225/97
• US Class Current: 225/100
• CPC Class Codes: B65H 35/10 from or with devices for breaking partially-cut or perforated webs, e.g. bursters
• CPC Class Codes: Y10T 225/16 Transversely of continuously fed work
• CPC Class Codes: Y10T 225/35 Work-parting pullers [bursters]

Abstract

A sheet separating apparatus is designed so that tension is applied to a continuous sheet having weakened lines arranged thereon at predetermined distances so that the continuous sheet is separated along the weakened lines. The sheet separating apparatus comprises first and second conveying mechanisms spaced from each other and adapted to transfer the continuous sheet and to increase tension on the continuous sheet along the course of transfer thereof, and a guide roller for maximizing the increased tension at a predetermined position in the continuous sheet, thereby starting separation of the continuous sheet at that portion of each weakened line which corresponds to the predetermined position.

Claims

1. A sheet separating apparatus for separating a sheet, which is elongated in a longitudinal direction and includes a plurality of weakened lines each crossing the longitudinal direction of said sheet, into a plurality of relatively small pieces along said weakened lines, said apparatus comprising:

first tensioning means for applying tension to said sheet in said longitudinal direction thereof; and

second tensioning means for applying additional tension in said longitudinal direction which additional tension is non-uniform along successive weakened lines and which additional tension is applied while said sheet is being tensioned by said first tensioning means;

wherein said second tensioning means includes a roller located in a fixed position and having an axis extending across the width of said sheet, said roller including a plurality of disks space apart along said axis, said disks gradually decreasing in diameter from a central portion of said roller toward each end of said roller, the outer peripheries of said disks abutting against said sheet to apply non-uniform tension along the width of said sheet.