Browse Prior Art Database

Printer Paper Drive Mechanism

IP.com Disclosure Number: IPCOM000093308D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Mathurin, EL: AUTHOR [+2]

Abstract

The mechanism is utilized to drive a paper tractor. The tractor is connected to shaft 10 which is driven by external gear 12. The drive to gear 12 is controlled by clutch 14 which is energizable to drive shaft 16 and to drive gear 12 through gears 18 and 20. Fixedly mounted to shaft 16 is disk 22 having a plurality of slots. These slots are arranged in inner row 24 and a second plurality of slots is arranged in outer row 26. Sensing device 28, comprising a light and a photosensitive device mounted on opposite sides of disk 22, is provided to generate a series of signals as the slots pass device 28. The signals generated by device 28 are utilized to control clutch 14 so that the tractor is driven one step for each slot in desk 22.

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Printer Paper Drive Mechanism

The mechanism is utilized to drive a paper tractor. The tractor is connected to shaft 10 which is driven by external gear 12.

The drive to gear 12 is controlled by clutch 14 which is energizable to drive shaft 16 and to drive gear 12 through gears 18 and 20. Fixedly mounted to shaft 16 is disk 22 having a plurality of slots. These slots are arranged in inner row 24 and a second plurality of slots is arranged in outer row 26. Sensing device 28, comprising a light and a photosensitive device mounted on opposite sides of disk 22, is provided to generate a series of signals as the slots pass device 28. The signals generated by device 28 are utilized to control clutch 14 so that the tractor is driven one step for each slot in desk 22. This is accomplished by using the pulses to control magnet 30 to temporarily retract stop arm 32. This action permits stop sleeve 34 to move until stop arm 32 engages the next stop 36 to de-energize clutch 14. Selection between rows 24 and 26 also permits a selection of magnet control pulses so that the clutch magnet remains energized the proper time to insure engaging the proper stop
36. Thus, the spacing of the paper by the tractor can be controlled by the placement of the slots in disk 22 and the selection of a particular row by positioning sensing device 28 adjacent to it. Lever 30 provides a manual vertical adjustment for the paper in the tractor which can be operated without disengaging clutch 14.

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