Grooved roller assembly for laterally stretching film
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United States of America Patent
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-
Jan 18, 1983
Grant Date -
N/A
app pub date -
Mar 28, 1978
filing date -
Mar 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a novel groove roller and roller assembly comprised of two of such grooved rollers wherein the grooved roller is comprised of a plurality of discs having varying diameters and positioned on a shaft thereby forming a grooved roller of self-centering groove components. In a preferred embodiment, discs of one diameter and discs of another diameter are alternately mounted on the shaft. Also disclosed is a roller assembly formed of two of such grooved rollers in interdigitating or intermeshing relationship for laterally stretching incremental portions of an orientable thermoplastic substrate by introducing such substrate into a nip formed by such interdigitating grooved rollers whereby the velocity of introduction thereof is controlled to substantially the rotational velocity of such grooved rollers.
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