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Stepper Drive for Web Material

IP.com Disclosure Number: IPCOM000079310D
Original Publication Date: 1973-Jun-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Schopp, RE: AUTHOR

Abstract

The drive propels a paper document or web 14 forwardly in direction A, each time that a drive sector arm 16 oscillates with respect to a fixed base 11.

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Stepper Drive for Web Material

The drive propels a paper document or web 14 forwardly in direction A, each time that a drive sector arm 16 oscillates with respect to a fixed base 11.

Drive sector arm 16 is swingably mounted at 20 with respect to base 11. A spring 21 is positioned effectively between arm 16 and base 11 and tends to move arm 16 into contact with a stop 12 on base 11. An electromagnet 22 having an armature 23 is carried by base 11, and armature 23 is adapted to align with an elongate part 24 carried by arm 16. Upper and lower drive sectors 17 and 18 are swingably mounted with respect to arm 16, and a back-lock sector 15 is swingably mounted on base 11. Sector 15 is positioned opposite a platen portion 25 of base 11 and has an ever increasing radius, so that sector 15 tends to rotate in the counterclockwise direction to grip document 14 between it and platen portion 25 to prevent movement of document 14 in direction B. Sector 15 rotates in the clockwise direction to release document 14, allowing it to move in the direction A.

Sectors 17 and 18 are swingably mounted on arm 16. Sector 17 is identical with sector 15, and sector 18 is a mirror image of sector 17 so that as arm 16 oscillates about pivot 20 away from stop 12, sectors 17 and 18 grip document 14 to move it in the direction A; and, as arm 16 moves in the opposite direction, sectors 17 and 18 swing to disengage with respect to document 14. Arm 16 is oscillated by continued energizations of ele...