Browse Prior Art Database

Paper Advance Control Device

IP.com Disclosure Number: IPCOM000094677D
Original Publication Date: 1965-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Gergaud, F: AUTHOR

Abstract

In initial status, paper feed shaft 1 is maintained out of gear because ratchets 2 and 3 lock it in both directions ad spiral spring 4 is wound up. One extremity 5 of this spring is fixed to gear 6 which drives shaft 1. The other extremity 7 is fixed to gear 8 which is driven by winding up shaft 9.

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Paper Advance Control Device

In initial status, paper feed shaft 1 is maintained out of gear because ratchets 2 and 3 lock it in both directions ad spiral spring 4 is wound up. One extremity 5 of this spring is fixed to gear 6 which drives shaft 1. The other extremity 7 is fixed to gear 8 which is driven by winding up shaft 9.

When paper 10 is to be driven, the suitable ratchet is removed and shaft 1 is made to rotate through gear 6 and spring 4. As gear 8 is fixed, member 11, which acts as a differential, now rotates. When it has moved through an angular path from contact 12 to contact 13, the latter actuates a system comprising motor 14, reducer 15 and clutch 16. The system winds up spring 4 through shaft 9 and gear 8. When member 11 reaches contact 12 again, the latter stops the motor.

While the paper is being fed, the inertia of the driven piece is low. To further reduce masses, driving belts 17 bearing plastic wedges are provided, the wedges being mounted on teeth 18. Teeth 18, which have bending movements, increase the flexibility of the system.

Also, belts 17 are made to move according to a curve such that the wedges always keep facing the perforation center.

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