Browse Prior Art Database

Feed Controlling Mechanism for Document Picker

IP.com Disclosure Number: IPCOM000080392D
Original Publication Date: 1973-Dec-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

McDaniels, LM: AUTHOR

Abstract

When a document transport (DOT) device, as shown and described in U.S. patent 3,747,921 is used as a document picker, it is desirable to maintain a constant angle of attack of the DOT tip relative to the document stack. It is also desirable to be able to lift the DOT tip from contact with the document stack, in order to eliminate the tip's influence on the stack. It is further desirable to control the normal force applied to the document stack by the DOT tip.

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Feed Controlling Mechanism for Document Picker

When a document transport (DOT) device, as shown and described in U.S. patent 3,747,921 is used as a document picker, it is desirable to maintain a constant angle of attack of the DOT tip relative to the document stack. It is also desirable to be able to lift the DOT tip from contact with the document stack, in order to eliminate the tip's influence on the stack. It is further desirable to control the normal force applied to the document stack by the DOT tip.

This illustrated mechanism performs the following functions:

Maintains a constant angle of attack of the DOT tip to the document stack; lifts the DOT device and thus removes the DOT tip from contact with the document stack; and controls the normal force applied by the DOT tip to the document stack.

In the rest position, the DOT device 1 is held out of contact with document stack 2 by extension spring 3 operating through linkage arm 4, and by extension spring 5 operating through link 6 and lifter arm 7. Linkage arm 4 is fixed to shaft 8 which rotates in frame 9 which is fixed. Lifter arm 7 rotates freely on shaft 8, and thus its motion is independent of the rotation of shaft 8 by linkage arm 4. Pin 10 in lifter arm 7 passes under the short member of linkage arm 4, transmitting motion from spring 5 to linkage arm 4. Linkage aim 11 is fixed to shaft 12 (which rotates in frame 9) and completes the four-bar linkage formed by DOT device 1, linkage aim 4, and frame 9. Studs 13 and 14 in :DOT device 1 rotate freely in linkage arms 4...