Browse Prior Art Database

Constant Indexing Paper Takeup Roll Drive

IP.com Disclosure Number: IPCOM000089575D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Sebrosky, RA: AUTHOR [+2]

Abstract

In many printing machines in use today for point-of-sale terminals and similar applications, there exists a need to preserve a journal or station record of the printing activity conducted at the terminal. This is usually accomplished by providing a journal reel of paper on which a record of the printing activity is kept. The journal roll of paper is fed through the printer and taken up at a takeup reel, and the problem of gradually increasing roll diameter is presented. As the roll diameter grows, the amount of paper drawn off the supply roll increases, and the spacing between printed lines on the journal paper also increases. This wastes paper and, in an extreme instance, may require cutting the ribbon or tape and rethreading to create a smaller diameter roll.

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Constant Indexing Paper Takeup Roll Drive

In many printing machines in use today for point-of-sale terminals and similar applications, there exists a need to preserve a journal or station record of the printing activity conducted at the terminal. This is usually accomplished by providing a journal reel of paper on which a record of the printing activity is kept. The journal roll of paper is fed through the printer and taken up at a takeup reel, and the problem of gradually increasing roll diameter is presented. As the roll diameter grows, the amount of paper drawn off the supply roll increases, and the spacing between printed lines on the journal paper also increases. This wastes paper and, in an extreme instance, may require cutting the ribbon or tape and rethreading to create a smaller diameter roll.

The present article describes a mechanism which continuously adjusts the incremental rotary drive applied to the takeup spool as a function of the diameter of the wound roll on the takeup spool. The angular motion of the paper takeup shaft drive is adjusted through a linkage mechanism to be described.

In Fig. 1, the journal paper supply 1 is wound on a takeup spool 2, which is driven by means of a gear drive 3 mounted on the end of a drive shaft 4. Drive shaft 4 is supported at its opposite end in a bearing 5, and shaft 4 runs through a clutch 6. Clutch 6 is driven by a yoke arm 7 which has a slot 8 engaging a drive pin 9 rigidly secured to oscillatory drive shaft 10. The drive shaft 10 is oscillated back and forth...