Browse Prior Art Database

Straight Paper Feeding

IP.com Disclosure Number: IPCOM000094348D
Original Publication Date: 1966-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Emig, MB: AUTHOR

Abstract

Paper is accurately fed in line space increments from a roll 10 onto and around platen 11 of a typewriter or other printer. Such feeding is under the control of tensioning and compensating roll 12.

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Straight Paper Feeding

Paper is accurately fed in line space increments from a roll 10 onto and around platen 11 of a typewriter or other printer. Such feeding is under the control of tensioning and compensating roll 12.

Rotation of platen 11 by line feed mechanism, not shown, causes a transient tension in paper coming from roll 10 and exerts a force F on control roll 12. Force F is normally applied at the center of the paper. Roll 12 is supported by internal roll 13 through a central ball 14 that is spring-loaded by a pair of spring wedging members 15. Force F is resisted by members 15 and the amount of resistance is established by adjusting screws 16.

This adjustment is balanced so that the linear movement of the paper by the line feed action does not produce a high inertial force and cause excessive unrolling of roll 10. The energy to unroll the paper, stored in spring 18, as roll 12 is forced towards roll 13 is released slower than the line feed action. Therefore, a small frictional load, supplied by the supports against both ends of the paper roll, is sufficient to prevent slack. Any tendency for the paper to shift laterally on platen 11 causes force F to be applied at a point offset from the center of ball 14. A resulting compensating force, developed by the wedging members 15, straightens the paper.

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