Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1978-12-11
1980-04-01
McCarthy, Edward J.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
279 1Q, B65M 7524, B23B 3140
Patent
active
041957920
ABSTRACT:
An improved sleeve construction for mandrels of the type which grip tubular members such as paper rolls by selectively expanding a rubber or other deformable material sleeve into gripping relation with the inner wall surface of the tubular members wherein the sleeve is sealed at the opposite ends thereof to the mandrel shaft and air is introduced against the inner wall of the central portion of the sleeve to expand it. The sleeve itself is tubular in shape and formed of a rubber material with alternating portions of arcuately long, radially thick, dimensionally stable, first segments separated by arcuately short, radially thin, dimensionally deformable, second segments. The short thin segments are expanded responsive to the introduction of air against the inner wall thereof while the longer, thicker segments include an outer surface which is moved into gripping relation with the tubular members responsive to expansion of the second segments. When the sleeve is expanded, the radially thin segments are dimensionally deformed and stretched causing the effective diameter of the sleeve to increase, even though the dimensions of the larger, thicker segments are not themselves deformed and stretched to any appreciable extent.
REFERENCES:
patent: 2290739 (1942-07-01), Chapman
patent: 2711863 (1955-06-01), Grettve
patent: 2801694 (1957-08-01), Schneider
patent: 3295188 (1967-01-01), Sayeressig
patent: 3552672 (1971-01-01), Grettve
patent: 3904144 (1975-09-01), Gattrugeri
patent: 3937412 (1976-02-01), Damour
patent: 4030415 (1977-06-01), Fellows
patent: 4114909 (1978-09-01), Taitel
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