Thin film cover and method of making same

Details Thin film cover and method of making same Thin film cover and method of making same

1996-12-18

1999-08-03

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425425, 425435, 264 21, B29C 504

Patent

active

059321636

ABSTRACT:
A PVC film cover including a down and interned marginal portion terminating in a thickened bead, the marginal portion tapering in thickness from the bead toward the central body portion of the cover. The cover is produced through the use of a shape-conforming mold into whose central portion liquid PVC is dispensed while the mold is rotating. The liquid PVC moves over the mold surfaces outward toward the outer marginal portion thereof by centrifugal force and rotation of the mold is terminated and the mold is quickly inverted into a downwardly opening position whereupon the excess liquid PVC at the outer periphery of the mold flows slowly down to a reversely turned edge for forming the bead of the cover. In quick succession, the mold is heated in order to gel and then harden the liquid PVC, mold is cooled and the cover is thereafter removed from the mold.

REFERENCES:
patent: 2009629 (1935-07-01), Mechlin
patent: 2047691 (1936-07-01), Kronquest
patent: 2368046 (1945-01-01), Sidebotham
patent: 2442179 (1948-05-01), Shanklin et al.
patent: 2569852 (1951-10-01), Green
patent: 2770557 (1956-11-01), Atti
patent: 2950990 (1960-08-01), Johnson
patent: 3146873 (1964-09-01), Johnson
patent: 3314639 (1967-04-01), Barnett
patent: 3389070 (1968-06-01), Berghaus et al.
patent: 3506431 (1970-04-01), Blanding
patent: 3530825 (1970-09-01), Antonissen
patent: 3829272 (1974-08-01), Carillon et al.
patent: 3844702 (1974-10-01), Dimmer et al.
patent: 3870015 (1975-03-01), Brown et al.
patent: 4101925 (1978-07-01), Kelley et al.
patent: 4148942 (1979-04-01), Gierek et al.
patent: 4201149 (1980-05-01), Koester et al.
patent: 4294792 (1981-10-01), Arons et al.
patent: 4392805 (1983-07-01), Golyak et al.
patent: 4416213 (1983-11-01), Sakiya
patent: 4434113 (1984-02-01), Neefe
patent: 4590094 (1986-05-01), Ringer, Jr.
patent: 4601923 (1986-07-01), Bonato
patent: 4659522 (1987-04-01), Neefe
patent: 4680149 (1987-07-01), Rawlings et al.
patent: 4794977 (1989-01-01), Iversen
patent: 5035601 (1991-07-01), Lin
patent: 5040590 (1991-08-01), Brandriff
patent: 5098628 (1992-03-01), Okamoto et al.
patent: 5238878 (1993-08-01), Shinohara
patent: 5250116 (1993-10-01), Tanimoto
patent: 5393215 (1995-02-01), Donovan, Sr.
patent: 5453230 (1995-09-01), McClellan et al.
patent: 5468324 (1995-11-01), Hong

Affiliated with

Also associated with

Rating

Thin film cover and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thin film cover and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thin film cover and method of making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-847115