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AssigneeCloud Corporation
InventorsAdam J. Dworak, Charles E. Cloud
Estimating the term…
A high speed method of manufacture of filled polyethylene pouches from polyethylene film comprising the steps of folding the film and causing it to move in folded flat form transversely sealing the film at longitudinally spaced intervals forming a continuous length of open edged unfilled polyethylene pouches, perforating the strip or web forming transversely extending longitudinally spaced lines of perforations between the pouches, exerting a vacuum upon the strip or web holding down sides of the unfilled pouches to stabilize the held sides thereof, blowing air at the open edged unfilled polyethylene pouches separating unheld sides of the pouches away from the vacuum held sides of the pouches, thus consecutively opening the pouches preparatory for filling the pouches, filling the pouches by moving articles to be packaged into the opened unfilled ends of the pouches, sealing the open ends of the filled pouches, and severing the pouches from the continuous strip for cartoning.
A rotary drum sealing apparatus for sealing low density polyethylene film for packaging articles comprising a hollow rotary drum for sealing film at its outer perimeter, film heating mechanisms reciprocally mounted interiorly of said drum, circumferentially spaced drum slots extended through the perimeter of said drum for receiving outer ends of said film heating mechanisms, "Teflon" coated stainless steel slot shields closing said drum slots for shielding the film from the outer ends of said film heating mechanism to prevent direct contact of the film with said heating mechanisms and with said film heating mechanisms in periodic contact with the shields for heating the shields and sealing the film, means securing said slot shields to said drum enabling the film to be maintained at all times free of contact from said film heating mechanisms, and timed means for retracting said film heating mechanisms after package seals have been sequentially formed in the film.
A rotary drum sealing apparatus for sealing low density polyethylene film for packaging articles comprising a hollow rotary drum for sealing film at its outer diameter, radially extending film heating mechanisms extending radially of a central axis of said drum and mounted inside said hollow drum, circumferentially spaced drum slots extending through an outer perimeter of said drum for receiving outer ends of said film heating mechanisms, high temperature, heat resistant, nonsticky type synthetic plastic coated slot shields closing said drum slots for shielding the film from the outer ends of said film heating mechanism to prevent direct contact of the film with said heating mechanisms, means securing said slot shields to said drum timed means for extending said film heating mechanisms into operative engagement with said shields for heating the shields, and means for retracting said heating mechanisms after the package seals have been sequentially formed in readiness for another cycle of operation.
A rotary drum sealing apparatus for sealing low density polyethylene film for packaging articles comprising a hollow rotary drum for sealing film at its outer diameter, radially extending film heating mechanisms positioned in said hollow drums radially outwardly of a central axis of said drum, circumferentially spaced drum slots through said drum for receiving outer ends of said film heating mechanisms, high temperature, heat resistant, non-sticky type synthetic plastic coated metallic slot shields closing said drum slots for shielding the film from the outer ends of said film heating mechanism to prevent direct contact of the film with said heating mechanisms, means securing said slot shields to said drum enabling the film to be maintained at all times free of contact from said film heating mechanisms, and means for moving said film heating mechanisms in said hollow drum into contact with said shields for heating the film, and timed means for retracting said film heating mechanisms after the package seals have been sequentially formed.
A method of packaging continuously formed pouches from low density polyethylene layered film comprising the steps of training the layered film onto a drum over slots in its outer periphery, consecutively heating "Teflon" coated metallic shields over the slots while the low density polyethylene layered film is engaged with the shield causing the state of the layered film to change to a high temperature liquified state, moving a serrated knife into the liquified film while in the high temperature liquified state with the serrations being immersed in the liquified film, cooling the shields causing the liquified film to solidify and to become fused thereby forming serrated seals which seals are located at spaced intervals along the length of the layered film.
A method of packaging continuously formed pouches from low density polyethylene layered film comprising the steps of training the layered film onto a drum over slots in its outer periphery, consecutively heating heat resistant, non-sticky type synthetic plastic coated metallic shields over the slots while the low density polyethylene layered film is engaged with the shield causing the state of the layered film to change to a high temperature liquified state, moving a sealing head against the liquified film while in the high temperature liquified state to assist in sealing the liquified layered film, cooling the shields causing the liquified film to solidify and to cause the film layers to become fused thereby forming seals which seals are located at spaced intervals along the length of the layered film.
Dependencies are inferred from the claim text.