Browse Prior Art Database

Multiple Copy Control for Typewriters

IP.com Disclosure Number: IPCOM000074150D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Walton, ND: AUTHOR

Abstract

In present typewriters, it is common practice to equip them with a platen positioning device or ring positioning device called a multiple copy control to compensate for the number of copies being typed. These devices are usually controlled manually by the operator and must be preset for each particular job. Also, the front end rear feed rolls are spring loaded against the platen which is mounted in a fixed position. The rear feed rolls are normally the driving feed rolls and must push the paper pack through the front feed rolls into the print position, thereby causing the paper to sag and get out of good registration with one another so that by the time it reaches the print position, it is a soft, loose pack which does not present a good typing surface.

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Multiple Copy Control for Typewriters

In present typewriters, it is common practice to equip them with a platen positioning device or ring positioning device called a multiple copy control to compensate for the number of copies being typed. These devices are usually controlled manually by the operator and must be preset for each particular job. Also, the front end rear feed rolls are spring loaded against the platen which is mounted in a fixed position. The rear feed rolls are normally the driving feed rolls and must push the paper pack through the front feed rolls into the print position, thereby causing the paper to sag and get out of good registration with one another so that by the time it reaches the print position, it is a soft, loose pack which does not present a good typing surface. This device shows an automatic means for multiple copy control without the necessity for manual preset by the operator and the elimination of the paper sagging as mentioned. Front feed rolls 1 are mounted in a fixed position and now become the driving feed rolls. Platen 2 and lightly spring loaded rear feed rolls 3 are allowed to pivot together counterclockwise about shaft 4 to provide space for the paper pack 5 to pass through to the print position and, thereby, by its thickness provide an automatic adjustment of the distance between the ring 6, platen 2, and the printing surface of the paper pack 5, thus maintaining good ring and platen relationship.

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