Browse Prior Art Database

Continuous Forms Input Buffer

IP.com Disclosure Number: IPCOM000109812D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Broom, W: AUTHOR [+10]

Abstract

This input buffer was designed specifically to reduce the force perturbations on the tractors caused by the continuous forms motion out of the box and through the chad brush.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 86% of the total text.

Continuous Forms Input Buffer

       This input buffer was designed specifically to reduce the
force perturbations on the tractors caused by the continuous forms
motion out of the box and through the chad brush.

      The input buffer is a slack loop buffer that is located between
the input tractors and the box of paper (see figure).  The input
buffer serves to isolate the tractors and tractor servo from any
paperline forces generated by pulling paper from the box and pulling
paper through the chad brush.  This improves print position accuracy
and prevents tractor hole damage.  Paper is put into the buffer by a
roll driven by a DC servo motor.  Roll velocity is controlled by a
servo card using the information from the three optical sensors
located in the buffer.  The roll puts paper into the buffer whenever
the tractors are moving paper forward and the buffer full sensor is
not made.  When the servo sensor is covered, paper is fed into the
buffer at 80-percent of process speed.  If the servo sensor is not
made, paper is put into the buffer at 120-percent of process speed.
The buffer empty sensor is used to flag an error if the input buffer
does not have any paper in it.  An added benefit of the input buffer
is its paper capacity.  Should the trailing sheet at the end of a box
of paper be damaged and unsuitable for splicing, the operator can
tear it off and pull sufficient paper out of the buffer to do the
splicing operation.

      The input buffer pr...