Browse Prior Art Database

Bidirectional Printer Carriage

IP.com Disclosure Number: IPCOM000077125D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Darwin, DP: AUTHOR [+3]

Abstract

The print carriage utilizes four tractors, two above the print position and two below the print position. The tractors are driven from a stepping motor which can be run in either direction to move the paper up or down.

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Bidirectional Printer Carriage

The print carriage utilizes four tractors, two above the print position and two below the print position. The tractors are driven from a stepping motor which can be run in either direction to move the paper up or down.

Tractors 1 and 2 are mounted on a frame member 3. Guide rods 4 and 5 allow frame member 3 to be positioned at the appropriate location and locked by clamp 6.

Tractors 7 and 8 are similarly mounted on a frame member 9, which is supported by guide rods 4 and 5. A clamp 10 similar to 6 holds frame member 9 in position on guide rod 4. Since both frame members are clamped to guide rod 4, an adjustment knob 11 which moves guide rod 4 axially, allows the tractors to be positioned simultaneously once the proper spacing is determined.

The tractors are driven from shafts 12 and 13, which are coupled to a stepping motor connected to drive pulley 14 by timing belt 15. Appropriate control circuitry allows the stepping motor to be driven in either direction.

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