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US 4,045,272 AGranted
Apparatus for sealing plastic films and the like
AssigneeBarney Knitting Machinery Co., Inc.
InventorAnthony Joseph Lombardi
Life of this patent
Estimating the term…
Abstract
There is disclosed herein an improved method and apparatus for plastic sealing/bonding in which a wire element is positioned between two interfacing (plastic) pieces to be sealed/bonded together, wherein one or both of said pieces are wholly plastic or contain a plastic component. With the wire sandwiched and retained between the interfacing surfaces, a voltage is applied to the wire for a predetermined time to cause the wire to heat sufficiently to melt both interfacing surfaces and effect a fusion and formation of a bond.
Claims14
Sealing apparatus comprising in combination:
- a housing supported on a base member;
- a pressure arm ember pivotally mounted to selectively exert pressure along one surface of said housing;
- pin means mounted on said one surface to retain plastic pieces to be bonded together in an overlapping manner;
- conducting means to retain and position a wire element between the overlapping pieces along said one surface of said housing;
- wire cutting means mounted on said one surface and activated by said arm to cut said wire;
- and
- control means coupled to said conducting means to apply a voltage to said wire for a predetermined time during exertion of pressure along said one surface to effect the bond between said pieces.
4 more elements
Sealing apparatus comprising in combination:
- a housing supported on a base member;
- a pressure arm member pivotally mounted to selectively exert pressure along one surface of said housing;
- means mounted on said one surface to retain plastic pieces to be bonded together in an overlapping manner, said means including a positioning bar with a plurality of retaining pins;
- conducting means to retain and position a wire element between the overlapping pieces along said one surface of said housing;
- wire cutting means mounted on said one surface and activated by said arm to cut said wire;
- and
- control means coupled to said conducting means to apply a voltage to said wire of a predetermined time during exertion of pressure along said one surface to effect the bond between said pieces.
4 more elements
Sealing apparatus comprising in combination:
- a housing supported on a base member;
- a pressure arm pivotally mounted to selectively exert pressure along one surface of said housing;
- means mounted on said one surface to retain plastic pieces to be bonded together in an overlapping manner;
- conducting means to retain and position a wire element between the overlapping pieces along said one surface of said housing;
- wire cutting means mounted on said one surface and activiated by said arm to cut said wire;
- and
- control means coupled to said conducting means to apply a voltage to said wire for a predetermined time during exertion of pressure along said one surface to effect the bond between said pieces.
4 more elements
Sealing apparatus comprising in combination:
- a housing supported on a base member;
- a pressure arm member pivotally mounted to selectively exert pressure along one surface of said housing;
- means mounted on said one surface to retain plastic pieces to be bonded together in an overlapping manner;
- conducting means to retain and position a wire element between the overlapping pieces along said one surface of said housing;
- wire cutting means mounted on said one surface and activated by said arm to cut said wire;
- and
- control means coupled to said conducting means to apply a voltage to said wire for a predetermined time during exertion of pressure along said one surface to effect the bond between said pieces, said control means including a switch means activated by said pressure arm to initiate said predetermined time.
4 more elements
Sealing apparatus comprising in combination:
- a housing supported on a base member;
- a pressure arm member pivotally mounted to selectively exert pressure along one surface of said housing;
- pin means mounted on said one surface to retain plastic pieces to be bonded together in an overlapping manner;
- strip magnets and spring leaf members mounted on said one surface to cooperatively retain with said pin means the plastic pieces in place during bonding;
- conducting means to retain and position a wire element along the overlapping pieces on said one surface of said housing;
- wire cutting means mounted on said one surface and activated by said arm to cut said wire;
- and
- control means coupled to said conducting means to apply a voltage to said wire for a predetermined time during exertion of pressure along said one surface to effect the bond between said pieces.
5 more elements
Dependencies are inferred from the claim text.