B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/30.01
B32B 3/12 (2006.01) B29C 51/22 (2006.01) B32B 3/28 (2006.01) B32B 38/04 (2006.01)
Patent
CA 1320117
ABSTRACT OF THE DISCLOSURE Two embodiments are depicted for forming air-cushioning material of thin gauge. Two rolls of thermoplastic material are used and each roll as a strip is fed to a heated roller. The first roller receives a strip as a heat-softened first film is fed in an S-path to a driven forming roller which is in non-contacting position from the first roller. This forming roller is provided with a multiplicity of cavities whose inner ends are in communication with a condout. The outer surface of this forming roller has an attached resilient and insulating covering on the peripheral surface but absent from each of the multiplicity of cavities. A second lidding film is drawn from the second roll and is brought into contact with a pressure roller whereat this lidding film is heated to a welding condition. This pressure roller is spaced from the forming roller a selected distance so that the two films are pressed and welded together. The air-cushioning materials are then cooled by a cooling roller and then, as a strip product, proceed to a cutting or like condition. The two embodiments contemplate very thin films such as one-half thousandth to thicknesses of two-thousandths of an inch. The conduits are selectively brought in way of vacuum for forming the first heat-softened film into the multiplicity of cavities.
572933
Caputo Garry L.
Ridout & Maybee Llp
LandOfFree
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