Severing by tearing or breaking – Methods – Transversely of continuously fed work
Patent
1991-04-01
1992-08-25
Phan, Hien H.
Severing by tearing or breaking
Methods
Transversely of continuously fed work
225100, B65H 3510
Patent
active
051411423
ABSTRACT:
A bursting apparatus and method for conveying a web of sheet material having successive transverse lines of weakening along a longitudinal path from an upstream position to a downstream position and for separating the web along a transverse line of weakening. The apparatus includes a longitudinally extending housing; a first pair of vertically spaced rollers rotatably mounted on the housing transverse to the path of web travel; a second pair of vertically spaced rollers rotatably mounted on the housing downstream of the first pair of rollers; a device for driving the downstream pair of rollers at a given speed; and a stepper motor for driving the upstream pair of rollers normally at the given speed and momentarily at a second speed, which is less than the given rate of speed, when the web of material is first gripped by the second pair of rollers, whereby severance of the web of material is promoted along the transverse line of weakening when the transverse line of weakening is disposed intermediate the first and second pairs of rollers.
REFERENCES:
patent: 4284221 (1981-08-01), Nagel et al.
patent: 4375189 (1983-03-01), Berner et al.
patent: 4529114 (1985-07-01), Casper et al.
Malandra, Jr. Charles R.
Phan Hien H.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
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