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Carbon Ribbon Take Up Clutch Powered by Extension Spring

IP.com Disclosure Number: IPCOM000093985D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Mimlitch, RH: AUTHOR

Abstract

Typewriter ribbon R, fed by rolls C like those in U. S. Patent 2, 930,470, is wound on spool 1. Such winding is tension controlled by impositively driven crank arm 2 through one-way spring clutch 3.

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Carbon Ribbon Take Up Clutch Powered by Extension Spring

Typewriter ribbon R, fed by rolls C like those in U. S. Patent 2, 930,470, is wound on spool 1. Such winding is tension controlled by impositively driven crank arm 2 through one-way spring clutch 3.

Crank arm 2 is cyclically pivoted counterclockwise by ribbon control cam power arm 4, clevis link 5, and lost motion slot 6 to tension springs 7 and 8. Crank arm 2 is driven clockwise by springs 7 and 8 as permitted by descending clevis link 5. Only the clockwise motion of crank arm 2 is delivered to spool 1 due to one-way clutch 3. Thus, ribbon winding occurs only to the extent that the effective tensions in springs 7 and 8 exceed the effective tension in the ribbon R.

Ribbon tension is controlled by varying the tension of springs 7 and 8. For example, the tension of spring 7 can be varied as a function of the spool diameter by servo link 9. The tension of spring 8 can be varied manually by adjustment of crank arm 10 as for winding ribbons of different strength.

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