Device for tightening a coil on a cylindrical body

Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means

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Details

291573C, 29446, 29456, 165 76, 165168, 219311, 219535, 366144, 366149, 425378R, 425547, B29C 4574, B29C 4782

Patent

active

046361600

ABSTRACT:
A device for tightening a coil on a cylindrical body. The device has a first anchor for connecting one end of the heater coil to the cylindrical body, and a second anchor for connecting the second end of the coil to a rotatable ring on the cylindrical which forms a passageway between an injector and a mold in an injection molding apparatus. A threaded portion is arranged on the rotatable ring so that it engages directly with the cylindrical body or with a stationary ring member on the cylindrical body in a manner similar to a worm gear mechanism. Due to the rotation of the threaded member, a force is generated to stretch the coil, thus bringing the coil into positive contact with the surface of the cylindrical body along the entire length of the coil.

REFERENCES:
patent: 2987599 (1961-06-01), Voss
patent: 2992314 (1961-07-01), Drugmand et al.
patent: 3200878 (1965-08-01), Ainley et al.
patent: 3475597 (1969-10-01), Desloge
patent: 3812323 (1974-05-01), Pink
patent: 4112566 (1978-09-01), Dubosque et al.
patent: 4356624 (1982-11-01), Coverstone et al.

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