Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1983-08-25
1986-01-28
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264 462, 264 51, 264DIG84, 425 89, 425149, 425224, 425817C, B29C 6722, B29C 3944, B29C 3906
Patent
active
045670080
ABSTRACT:
A method of continuous production of foamed material, wherein foam forming materials are fed from below at a controlled rate and the foamed material is drawn away from above at a corresponding rate. Foaming takes place in a diverging expansion enclosure bounded by moving sheet material in the form of webs or in tubular form constrained to follow a diverging path and drawn away from above so as to travel with the foaming material at a rate corresponding to its rate of travel. The enclosure is defined above by foam already expanded, at the sides by the sheet material, and below by a feed zone sealed to contain the foam forming materials. The enclosure leads into an upwardly directed take off path for the foam. Appropriate machines for practicing the method utilize either webs of sheet material or sheet material in tubular form, which tubular form may itself be made by the machine from webs.
REFERENCES:
patent: 3584108 (1971-07-01), Nelson et al.
patent: 3971112 (1976-07-01), Amato et al.
patent: 4026979 (1977-05-01), Palomares
patent: 4069285 (1978-01-01), Morgan
Anderson Philip
Hinds William R.
Hyman International Limited
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