Browse Prior Art Database

Positive Document Control Registration Device

IP.com Disclosure Number: IPCOM000076140D
Original Publication Date: 1972-Jan-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Amundson, LL: AUTHOR [+2]

Abstract

The registration device includes a magnetic clutch 10 effective on a feed roll 11 for propelling a document card 12 into contact with a registration gate 13, and magnetic clutch 10 then slips so as to hold card 12 in engagement with gate 13.

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Positive Document Control Registration Device

The registration device includes a magnetic clutch 10 effective on a feed roll 11 for propelling a document card 12 into contact with a registration gate 13, and magnetic clutch 10 then slips so as to hold card 12 in engagement with gate 13.

Clutch 10 includes magnet 14 fixed with respect to an input shaft 15 and a magnetic material ring 16 fixed with respect to feed roll 11. Feed roll 11 includes a tire 11a of a material having a high coefficient of friction, and a pressure roll 17 is positioned opposite roll 11 so that card 12 is gripped between tire 11a and pressure roll 17. Card 12 may travel on a bed 18 of magnetic material, and gate 13 may include a magnetizable shoe 19 which engages bed 18 when shoe 19 is magnetized. An electric coil 20 is disposed in shoe 19 for magnetizing shoe 19. Shoe 19 is carried by a bracket 21, which is movably disposed with respect to a stationary part 22 by a flexure leaf spring 23.

As shaft 15 is driven, torque is transmitted to feed roll 11 due to the magnetic field in the gap between magnet 14 and ring 16. Card 12 is fed between feed roll 11 and pressure roll 17 to registration gate 13 so as to position the card properly for subsequent functions, such as punching or printing. When card 12 stops due to the action of gate 13, feed roll 11 also stops due to friction between it and card 12, causing slip to occur in the gap between magnet 14 and ring 16.

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