Expandable core for rolls of tubing

Details Expandable core for rolls of tubing Expandable core for rolls of tubing

1980-02-04

1981-10-27

Christian, Leonard D.

Winding, tensioning, or guiding

Bobbin or spool

Double-headed spool

242 865R, B65H 7524, B65H 7540

Patent

active

042968917

ABSTRACT:
An expandable core for handling and holding rolls of tubing. The core is comprised of support members connected to each other or a base extending along the longitudinal axis of the core by connecting links. The connecting links are pivotally attached at their terminal ends to the support members or the base rod to allow movement about a pivot assembly. Camming surfaces are mounted at the terminal ends of the support members and means for selectively expanding the core are adapted to engage the camming surface.

REFERENCES:
patent: 1573183 (1926-02-01), Mehlum
patent: 3326495 (1967-06-01), De Bruyn
patent: 3968940 (1976-07-01), Godbersen
patent: 4071203 (1978-01-01), Sneed et al.
patent: 4095706 (1978-06-01), Schwein et al.
Drainage Contractor, vol. 4, No. 1, p. 90, (1978).
Drainage Contractor, vol. 5, No. 1, pp. 12-13, (1979).

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