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Browse Prior Art Database

Paper Roll Cradle for a Journal Print Station

IP.com Disclosure Number: IPCOM000052324D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Shalkey, AT: AUTHOR

Abstract

A cradle mechanism comprises ramp 10 and transverse end plate 11 provid peripheral support to a loose supply roll 13. Paper 14 is pulled by an incrementing mechanism (not shown) from the top of roll 13. A loose drag roll 15 applies a downward force to the supply roll which minimizes the movement of the supply roll up the ramp 10 when incremented by the take-up mechanism. A polymer coating, such as TEFLON*, on the upper surface of ramp 10 reduces the friction between paper 14 under drag roll 15 and under supply roll 13. This allows supply roll 13 to unwind without unraveling in the event the incrementing force on paper 14 causes the supply roll and drag roll to be momentarily moved up ramp 10 and out of contact with end plate 11.

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Paper Roll Cradle for a Journal Print Station

A cradle mechanism comprises ramp 10 and transverse end plate 11 provid peripheral support to a loose supply roll 13. Paper 14 is pulled by an incrementing mechanism (not shown) from the top of roll 13. A loose drag roll 15 applies a downward force to the supply roll which minimizes the movement of the supply roll up the ramp 10 when incremented by the take-up mechanism. A polymer coating, such as TEFLON*, on the upper surface of ramp 10 reduces the friction between paper 14 under drag roll 15 and under supply roll 13. This allows supply roll 13 to unwind without unraveling in the event the incrementing force on paper 14 causes the supply roll and drag roll to be momentarily moved up ramp 10 and out of contact with end plate 11.

Switch lever 16 of an end-of-paper switch is located in opening 17 of ramp
10. Lever 16 is held depressed by the weight of drag roll 15 on paper 14 against the force of a bias spring 18. When the end of paper 14 is pulled past drag roll 15, switch arm 16 is released to move completely through opening 17 into groove 19 in drag roll 15. This amount of lever motion activates the end-of-paper switch for sending a signal to provide a new supply roll.

This configuration eliminates paper jamming caused by unwrapping or blousing of the supply roll 13 and reduces variations in line spacing. The low friction coating on ramp 10 minimizes the variation of friction resulting from environmental changes affe...