Browse Prior Art Database

Variable Force Forms Compressor With Easy Cleaning Feature

IP.com Disclosure Number: IPCOM000035222D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Baumberger, J: AUTHOR

Abstract

Disclosed is a system of mechanical components which provide selectable force levels on printer forms compressor flaps and an easy cleaning feature for removing debris produced during the printing operation.

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Variable Force Forms Compressor With Easy Cleaning Feature

Disclosed is a system of mechanical components which provide selectable force levels on printer forms compressor flaps and an easy cleaning feature for removing debris produced during the printing operation.

A moveable series of ramps is used in a line printer to produce a series of selectable forces operating to remove air between form parts to aid in achieving uniform print density among printer forms of various thicknesses or parts while permitting line spacing without tearing the form perforations.

(Image Omitted)

Referring to the figure, compressor flap 1 urges print forms 2 toward type on a print belt 3 for impact hammer 4 that is driven by push rod 5. Spring 8 urges flap 1 counterclockwise about shaft 9 to compress the forms while permitting limited opposite motion. Positioner 6 engages plunger 10 that rests against spring 8, plunger 13 and ramp series 11. Forms guide 7 limits the motion of flap 1 when the print belt carrier system is separated from the hammer unit for reasons such as forms loading. Under this condition, the shoulder on positioner 6 reaches its limit stop before flap 1 contacts forms guide 7 so the flap to forms guide force is minimal.

The forms guide is hinged with an attached rod 21 captured by a combed flat spring 14 to allow a form tractor 16 to be positioned nearby. The forms guide is retained in the operating position shown by permanent magnets 15. When the forms tractor is o...