Method and an apparatus for cambering the edges of webs of therm

Details Method and an apparatus for cambering the edges of webs of therm Method and an apparatus for cambering the edges of webs of therm

1979-07-25

1981-01-27

Welsh, Maurice J.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Sonic or supersonic wave energy

4251744, 264 23, B29C 300, B29F 500, B29C 1500

Patent

active

042472733

ABSTRACT:
The invention relates to an apparatus and a method for cambering the edge of webs of thermoplastic materials on one or both sides wherein the edges of the web are continuously guided through stamping units and the edges are provided with stampings. The thermoplastic cambering is made by utilizing the energy of ultrasonic vibration. The stamping unit consists of a stamping wheel with pressure apparatus for the wheel and a stationary ultrasonic head arranged beneath it with a sonotrode. A calibration apparatus can be arranged downstream of the stamping unit.

REFERENCES:
patent: 3160687 (1964-12-01), Andrews
patent: 3539344 (1970-11-01), Russell
patent: 3635609 (1972-01-01), Balamuth
patent: 3689346 (1972-09-01), Rowland
patent: 3749006 (1973-07-01), Loose
patent: 3771939 (1973-11-01), Barth
patent: 3890892 (1975-06-01), Loose et al.

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