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Dual Feed Carriage With Common Shaft

IP.com Disclosure Number: IPCOM000081590D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Bonafino, EJ: AUTHOR [+3]

Abstract

A unique dual-feed carriage shown in Fig. 1 utilizes a single nonround shaft 10, on which are mounted two pairs of round pin wheel tractors comprising separate left and right tractors 12a and 12d with a dual tractor 12b-c therebetween. These tractors are individually slideable along the shaft 10 upon squeezing release levers 14a - 14b. The tractors 12a and 12b are driven by the shaft 10, while the tractors 12c-d are mounted on the shaft 10 by low-friction bushings 13 as shown for tractor 12c in Fig. 2, which permit rotation of the tractors 12c-d relative to the shaft 10.

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Dual Feed Carriage With Common Shaft

A unique dual-feed carriage shown in Fig. 1 utilizes a single nonround shaft 10, on which are mounted two pairs of round pin wheel tractors comprising separate left and right tractors 12a and 12d with a dual tractor 12b-c therebetween. These tractors are individually slideable along the shaft 10 upon squeezing release levers 14a - 14b. The tractors 12a and 12b are driven by the shaft 10, while the tractors 12c-d are mounted on the shaft 10 by low-friction bushings 13 as shown for tractor 12c in Fig. 2, which permit rotation of the tractors 12c-d relative to the shaft 10.

As shown in Fig. 2 which is an exploded view of the tractor 12b-c, wedges 15a-b are positioned on opposite sides of the tractor 12b and are coupled by springs 16 to lock the tractor 12b on the shaft 10. Pressing the release levers 14a-b acts on one wedge directly and through a finger plate 17 on the other wedge, to separate the wedges and permit the dual tractor 12b-c to slide on the shaft. The tractors 12a and 12d are each provided with similar release levers 14a-b and wedges 15a-b for locating the tractors axially on the shaft 10. Tractors 12c and 12d are rotatable on their bushings 13 by chains 18 driven from a second shaft, not shown.

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