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DRIVE MECHANISM FOR PAPER FEED ROLLERS

IP.com Disclosure Number: IPCOM000024590D
Original Publication Date: 1981-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 119K

Publishing Venue

Xerox Disclosure Journal

Abstract

In an automatic paper feeder used in conjunction with an automatic typewriter or printer, the take-away rollers for ejecting the sheet from the printer must be spaced apart while the sheet is being controlled by the platen of the printer. When the printing has been completed and the sheet is ready to be ejected from the printer by the paper feeder, the take-away rollers must be snapped together and then driven in the proper direction to eject the paper. Normally, at least one solenoid and associated electronics are used to snap the take-away rollers together while a motor is used to drive the rollers.

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XEROX DISCLOSURE JOURNAL

32

F/G. 2

In an automatic paper feeder used in conjunction with an automatic typewriter or printer, the take-away rollers for ejecting the sheet from the printer must be spaced apart while the sheet is being controlled by the platen of the printer. When the printing has been completed and the sheet is ready to be ejected from the printer by the paper feeder, the take-away rollers must be snapped together and then driven in the proper direction to eject the paper. Normally, at least one solenoid and associated electronics are used to snap the take-away rollers together while a motor is used to drive the rollers.

A concept is disclosed to eliminate the solenoid and associated electronics and use the single motor to both feed and eject the sheets. A mechanism is disclosed which allows a motor to snap together a set of rollers and drive them while turning in one direction and to separate the rollers when the motor turns in the opposite direction.

Volume 6 Number 2 March/April 1981 53

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DRIVE MECHANISM FOR PAPER FEED ROLLERS (Cont'd)

With reference to Figures 1 and 2, motor 10 is attached to frame 12 with pulley 14 being attached to shaft 16 of motor 10. Shaft 18 is operatively positioned through frame 12 and is rotatable in bearing 20. The other end (not shown) is also positioned to rotate with respect to another portion (not shown) of frame 12. Drive rollers 22 (only one shown) are positioned around shaft 18 and rotate therewith. Friction washers 24 are positioned on shaft 18 on either side of actuation plate 26. Shaft 18 extends through an opening in actuation plate 26. Pulley 28 is attached to shaft 18 and is aligned with pulley 14 with belt 30 being in operative position around pulleys 14 and 28. Connecting plate 32 is pivotable about pin 34. One end of shaft 36 is terminated in connecting plate 32 through aperture 38 in frame 12. Pin 40 protrudes from connecting plate 32 and through slot...