Method of producing mat with valves therein
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 27, 1987
Issued Date -
N/A
app pub date -
Sep 11, 1985
filing date -
Jan 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A machine and method to operate the machine to provide a plurality of valve-like perforations in the rubber-like backing of a nap mat or carpet by delivering the nap mat or carpet to and under a spiked roll. The machine includes a sensing device to ensure the leading and trailing edges of the nap mat are not perforated by the spiked roll.
First Claim
Family
International Classification(s)
Cited Art Landscape
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