Apparatus for stretching a continuously advancing synthetic-resi

Details Apparatus for stretching a continuously advancing synthetic-resi Apparatus for stretching a continuously advancing synthetic-resi

1982-02-18

1984-01-31

Czaja, Donald E.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

2642107, 2642358, 2642902, 425400, B29C 1702

Patent

active

044287232

ABSTRACT:
An apparatus used in combination with an input machine that continuously delivers a stretchable web to an input location and with an output machine that operates stepwise to treat the web at a stationary output location has a reciprocal support frame between the locations and displaceable in an upstream direction toward the upstream location and a downstream direction toward the downstream location. Longitudinal and transverse stretchers are carried on the frame and have web-engaging elements displaceable relative to the frame in the downstream direction for stretching the web and holding the web in stretched condition. A storing or tempering stage between the frame and the upstream location supports a loop of the web so that as the frame moves back and forth this loops grows and diminishes. A drive connected to the stretchers continuously advances the web in the downstream direction relative to the frame at a web-travel rate. An actuator is connected to the frame to move same when moving in the upstream direction substantially at the web-travel rate. Thus the web stops moving at the downstream location during such upstream movement of the frame.

REFERENCES:
patent: 4105386 (1978-08-01), Thiel et al.
patent: 4140457 (1979-02-01), Miki et al.
patent: 4288400 (1981-09-01), Winstead

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