Browse Prior Art Database

Variable Speed Driver

IP.com Disclosure Number: IPCOM000050720D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Dahlen, T: AUTHOR

Abstract

A variable-speed belt-driving system is provided for shaft timing in a document feeding device or the like wherein the speed of a belt-driven shaft temporarily can be varied or stopped in an operating station by pushing the upstream part of the belt into a curved path and simultaneously releasing the downstream part of the belt from a curved path to a straight line, or vice versa.

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Variable Speed Driver

A variable-speed belt-driving system is provided for shaft timing in a document feeding device or the like wherein the speed of a belt-driven shaft temporarily can be varied or stopped in an operating station by pushing the upstream part of the belt into a curved path and simultaneously releasing the downstream part of the belt from a curved path to a straight line, or vice versa.

The belt 1 in the figure is driven by two synchronously rotating drive rolls 2 and 3. The belt path includes upstream feedrolls 11, downstream feed rolls 10 and an operating station 6 provided with a pair of belt-driven shafts 9. Men a tension roll 8 is pushed in the direction of the arrow 16, the belt part 13 will assume a curved form, indicated by the dashed line 12. Simultaneously a second tension roll 7 is moved in the opposite direction as indicated by the arrow 17 whereby the belt part 15 will be stretched into a straight line 14. As a result of the movement of the tension rolls 7 and 8, the speed of the belt in the operating station 6 will decrease and approach zero, and hence the turning speed of the rolls 9 will equally decrease. When the tension rolls 7 and 8 are actuated in the opposite direction, the belt speed and the turning speed of the rolls 9 will increase.

The system described may be incorporated into a document handler where the belt 1 is used as a document feeder for an upstream read station 4, a print station 6 and a downstream check station 5....