Plastic centre whose dimensions can be reduced, for forming spoo

Details Plastic centre whose dimensions can be reduced, for forming spoo Plastic centre whose dimensions can be reduced, for forming spoo

1994-08-15

1996-12-17

Mansen, Michael R.

Winding, tensioning, or guiding

Bobbin or spool

Open-work structure

68198, B65H 7520, D06F 1700

Patent

active

055844391

ABSTRACT:
A center with elongated slots (3) for reducing axial and transverse sections of the center. The elongate slots (3) are arranged in two series of intersecting helical alignments; on each of these alignments slots are arranged alternately with their greatest dimension along said helical alignment and transversely to it; at each intersection is a slot belonging to both alignments. When an axial compressive force is applied the slots shrink, thereby simultaneously reducing the axial and diametrical dimensions.

REFERENCES:
patent: 3323174 (1967-06-01), Fallscheer
patent: 3561697 (1971-02-01), Egyptien
patent: 3756531 (1973-09-01), Draper
patent: 3759461 (1973-09-01), Draper
patent: 4454734 (1984-06-01), Marquis et al.
patent: 5435497 (1995-07-01), Romagnoli

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