Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1978-08-25
1980-04-01
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264 51, 264239, 264294, 264299, 264321, 264DIG66, 425112, 425145, 425817C, B29D 2704
Patent
active
041961609
ABSTRACT:
A method and apparatus is provided for forming a cushion from foam plastic material by first depositing separate masses of foam material, each having a predetermined configuration, onto a moving transfer surface at a depositing station. While the masses of material are being transferred to a forming station, they rise to a tack-free state and reach substantially full expansion during a predetermined time period which is less than the time which it takes the foam material to set. Then, before the foam material does set, each mass of foam material is individually shaped at the forming station into a predetermined configuration by employing force-applying elements to press each of the masses of foam material into the predetermined configuration while on the transfer surface. Once the mass of foam material has been shaped and set, the force-applying elements are released. The cushions are being formed continuously, since while a first mass of material is being deposited at the depositing station, a second mass is on its way to the forming station, and a third previously-deposited mass of material is being shaped at the forming station.
REFERENCES:
patent: 3012283 (1961-12-01), Foster
patent: 3079641 (1963-03-01), Knox et al.
patent: 3311069 (1967-03-01), Underwood
patent: 3405215 (1968-10-01), Caldwell
Anderson Philip
Sealed Air Corporation
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