Browse Prior Art Database

Belt Guiding Tractor Doors

IP.com Disclosure Number: IPCOM000041066D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Scott, WD: AUTHOR

Abstract

A tractor door of a printer shown in the Figure includes a slot that closely engages the sides of the drive pins to guide the tractor belt.

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Belt Guiding Tractor Doors

A tractor door of a printer shown in the Figure includes a slot that closely engages the sides of the drive pins to guide the tractor belt.

Referring to the Figure which is a section of a tractor drive, a tractor door 1 is hinged to a central block of the tractor assembly 2 supporting a tractor belt 3. The endless tractor belt includes a plurality of attached, uniformly spaced drive pins 4 that extend outwardly from the belt surface. The hinged tractor door pivotally swings shut over the top driving surface of the tractor belt, and a slot 5 in the door closely engages the sides of the drive pins of the tractor belt.

In operation, the tractor door provides a guide for urging the web and associated perforations of the paper down onto the drive pins. The slot in the tractor door also functions as a lateral guide for the tractor belt as it moves linearly along the tractor since the slot and the drive pins are closely engaged. This eliminates the need to guide the tractor belt by the use of lateral or belt edge guides in the tractor assembly, thereby reducing the tolerance buildup between the tractor belt, frame and door, and improving the paper handling performance of the printer.

Disclosed anonymously.

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