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Proportional Ribbon and Correction Feed Mechanism That Does Both Lift and Feed With a Single Motor

IP.com Disclosure Number: IPCOM000046239D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Mink, JW: AUTHOR [+2]

Abstract

The feeding of ribbons for printing and for correction commonly requires two separate drive trains and an elaborate mechanism for shifting the drive from the ribbon to the correction tape. The mechanism illustrated in the drawing provides a single motor 10 drive which is reversiable, such as a stepper motor which, through gear 12, drives idler gear 14. Idler gear 14 is supported on transfer arm 16. Transfer arm 16 is pivotally mounted coaxial to gear 12 and may rotate a limited amount in either direction about its mounting point. Also carried on transfer arm 16 is a camming member 18 engageable with cam surfaces 20 and 22 on arm 24.

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Proportional Ribbon and Correction Feed Mechanism That Does Both Lift and Feed With a Single Motor

The feeding of ribbons for printing and for correction commonly requires two separate drive trains and an elaborate mechanism for shifting the drive from the ribbon to the correction tape. The mechanism illustrated in the drawing provides a single motor 10 drive which is reversiable, such as a stepper motor which, through gear 12, drives idler gear 14. Idler gear 14 is supported on transfer arm
16. Transfer arm 16 is pivotally mounted coaxial to gear 12 and may rotate a limited amount in either direction about its mounting point. Also carried on transfer arm 16 is a camming member 18 engageable with cam surfaces 20 and 22 on arm 24.

By rotating the drive motor 10 such that it drives the gear 12 in a clockwise direction, the transfer arm 16 will rotate in a clockwise direction due to frictional drag in the system. As transfer arm 16 rotates carrying idler gear 14 to mesh with correction tape feed gear 26, camming member 18 will engage cam surfaces 20, thereby raising the ribbon lift arm 24 to present the correction tape at the print point. As the clockwise rotation of gear 12 continues, the driving, through idler 14, of gear 26 will cause the incremental feeding of the correction tape 28.

A reversal of drive motor 10 and gear 12 will cause the transfer arm 16 and idler gear 14 to oscillate in a counterclockwise direction around the motor axis and engage ribbon feed g...