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Process for producing a package
   
Document Number
US Patent 4321781
Issued Date
March 30, 1982
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Abstract
A process of producing a package for a product by heat-bonding through a heat sealable coating a first wall of porous spun bonded polyolefin material to a second and thicker wall of porous material, placing a product atop the first wall, draping a thermoformable film over the product, heating the film, drawing the film against the product and the first wall, and bonding the drawn film to the first wall during the drawing operation.
Drawing
Process for producing a package - US Patent 4321781 Drawing
Drawing from US Patent 4321781
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Number of Claims:
7
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Published
March 30, 1982
Application Number
06/155,229
Filed
June 2, 1980
US Classification
53/427   206/471 53/425
Int'l Classification
A61F   2/00   (20060101)   B65D   77/02   (20060101)   B65D   75/30   (20060101)   B65D   77/00   (20060101)   B65D   75/28   (20060101)  
Examiner
Assistant Examiner
Attorney/Law Firm
Parent Case
This is a continuation of application Ser. No. 948,475, filed Oct. 4, 1978, and now abandoned.
Priority Data
Oct 12, 1977 [GB] 42352/77
USPTO Field of Search
53/425   53/141   53/427   53/509   206/471  
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Description
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