Browse Prior Art Database

Constant Speed Document Feeding Device

IP.com Disclosure Number: IPCOM000096147D
Original Publication Date: 1963-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Bockh, L: AUTHOR

Abstract

Documents passing through a feed unit with start-stop operation are moved past a microfilm camera at a uniform speed. This is achieved by using a feed track driven at a constant speed and engaged with the feed unit by automatically operating and controlled clutch members.

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Constant Speed Document Feeding Device

Documents passing through a feed unit with start-stop operation are moved past a microfilm camera at a uniform speed. This is achieved by using a feed track driven at a constant speed and engaged with the feed unit by automatically operating and controlled clutch members.

Pairs of feed rolls 3 and 4 are mounted on both sides of the camera objective 2, past which documents 1, passing through the feed unit, feed at a constant speed. The feed rolls are driven by a synchronous motor operating at the constant speed V2. This is higher than the maximum speed V1 of the rest of the feed unit. The documents fed by conveyor belt 5 are moved into the range of a pair of intermediate rolls 7 driven at the speed V1. The lower, spring-loaded roll exerts only a slight pressure on the documents.

Each document which is engaged by the pair of rolls 4 is removed from the feeding system. It is, independently of the current speed V1, moved past the film camera at the constant speed V2. At the discharge side, there are arranged, between the pair of rolls 3 and the conveyor belt 6, a pair of rolls. The lower roll 8 is driven at the speed V1. The upper roll 9 is raised through a control device when the feed track is stopped. In this case, the documents leaving the pair of rolls 3 move into a standby position at the pair of rolls 8 and 9. When the conveyor belt starts moving again, roll 9 is lowered again, so that the document lying in the stand-by po...