Browse Prior Art Database

Journal Printer Paper Drive

IP.com Disclosure Number: IPCOM000045787D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Allen, W: AUTHOR [+3]

Abstract

A magnet-actuated indexing clutch generates high acceleration forces a the air gap goes to zero. These forces usually produce the overdriving of a load driven through a one-way clutch. Two methods are disclosed to overcome this problem. The first method drives the load with a return spring, and the second method uses a toothed wheel and stop pawl to prevent overtravel.

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Journal Printer Paper Drive

A magnet-actuated indexing clutch generates high acceleration forces a the air gap goes to zero. These forces usually produce the overdriving of a load driven through a one-way clutch. Two methods are disclosed to overcome this problem. The first method drives the load with a return spring, and the second method uses a toothed wheel and stop pawl to prevent overtravel.

Fig. 1 shows a journal drive roll 11 and pressure roll 13 which move paper to a take-up roll 15. journal drive roll 11 is driven at the end of the paper index cycle by return spring 17 on solenoid 19. The return spring actuates journal drive roll 11 through lever arm 21 which is connected to the journal drive roll 11 by a one-way bearing 23. Motion of the drive roll causes the paper to develop a slack portion 25 which remains until the next index cycle.

During the first portion of the next index cycle, magnet 19 pulls on connecting link 27 to rotate both lever arms 21 and 29. Lever arm 29 is connected to take-up roll 15 through one-way clutch 31 and overrunning clutch 33. Overrunning clutch 33 transmits some of the acceleration forces to take-up roll 15 but dissipates extra overtravel motion. Return spring 17 then returns link 27 and the lever arms to their normal position, causing one-way bearing clutch 23 to again index journal drive roll 11. Both drive roll 11 and take-up roll 15 are mounted in antireverse bearings 35 and 37.

The second embodiment (Figs. 2 and 3) uses...