Letter sheet forming apparatus
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United States of America Patent
Stats
-
Jan 24, 1995
Issued Date -
N/A
app pub date -
Mar 23, 1993
filing date -
Nov 29, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A machine for forming letter sheets from a paper web having regularly spaced transverse cut lines extending inwardly from pin hole edges and leaving a perforated but uncut middle portion has a tractor feed, a slitter for removing the pin hole edges of the web, an in-line Z-folder, pinch rollers and a burster. The Z-folder has a length which is one and half to two times the spacing between transverse perforation lines. The speed of the tractor feed drive and pinch roller drive are monitored and a sensor senses each transverse cut so that the speed of the pinch rollers may be synchronized with the tractor feed.
First Claim
Family
International Classification(s)
Cited Art Landscape
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