B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
296/84, 154/71.0
B29C 65/00 (2006.01) B29C 65/02 (2006.01) B29C 65/08 (2006.01) E06B 3/70 (2006.01)
Patent
CA 1243927
ABSTRACT OF THE DISCLOSURE A method for manufacturing a door pad by the application of ultrasonic wave is provided, which com- prises the steps of putting a surface layer material, a filler padding made of normal polyurethane which is not subjected to any previous treatment and a backing board, in a laminated state, between ultrasonic machining horns and ultrasonic machining horn rests, and applying ultra- sonic vibration to desired portions of said laminate by the ultrasonic machining horns. Also, a door pad manufac- tured by ultrasonic welding is provided, which comprises a laminate consisting of a surface layer material, a filler padding or polyurethane molding made of normal polyurethane which is not subjected to any treatment and a backing board, wherein desired portions of said laminate are fusion-bonded by heat produced therein by ultrasonic vibration. The door pad according to this invention is excellent in physical properties and cheap in price.
457221
Macrae & Co.
Tachikawa Spring Co. Ltd.
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