Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1997-06-11
2000-08-08
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
83869, 83914, 83946, 264544, 264553, 409293, 409301, B23D 100, B29C 5100
Patent
active
06099777&
ABSTRACT:
A method for cutting openings in a sheet of thermoformed containers. The sheet of containers is indexed into a cutting assembly. The cutting assembly includes a shear plate having a plurality of openings formed therethrough, and having an upper surface which defines a cutting plane. A locating means including a plurality of anvils is raised so that the anvils enter the containers and raise the sheet toward the shear plate. The end portions of the containers are located within the openings of the shear plate, and a portion of the containers is positioned in the cutting plane. The cutting assembly includes a blade mounted on piston/cylinder assembly for sliding movement along the upper surface of the shear plate. The cylinder is actuated to move the blade along the cutting plane. The blade cuts off the portion of the containers and creates an opening in the containers.
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Machining of Plastics, pp. 1-3, 12-17, 143-149, Kobayashi, McGraw-Hill (1967) Industrial Plastics, pp. 157-165, Baird, Goodheart-Willcox (1986) Plastics Film Technology, pp. 170-175, Park, Van Nostrand Reinhold (1969).
Lee Edmund H.
Silbaugh Jan H.
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