Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1982-10-12
1983-12-06
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
24201C, 150 3, 156164, 156204, 15624425, 156465, 156499, 156500, 264177R, 264259, 425111, 425113, 428 35, 428358, B29C 2400, B65D 3324
Patent
active
044191596
ABSTRACT:
In the manufacture of plastic bags having interlocking profiled extrusions for the closure, the extruded plastic profile is applied to the moving web of film immediately after extrusion of the profile. The temperature of the moving web is maintained such that the profile adheres to the moving web upon contact and thereafter cools to set the thermoplastic in the desired profile. The moving web of film is maintained under tension so that contraction of the film upon release compensates for the contraction of the locking profile as it cools to prevent puckering of the web. The locking profile is applied to the web in an in-line process which includes folding and heat sealing the moving web of film to form plastic bags.
REFERENCES:
patent: Re28969 (1976-09-01), Naito
patent: 3226787 (1966-01-01), Ausnit
patent: 4279677 (1981-07-01), Takahashi
patent: 4295919 (1981-10-01), Sutrina et al.
patent: 4306924 (1981-12-01), Kamp
patent: 4341575 (1982-07-01), Herz
patent: 4372793 (1983-02-01), Herz
Dawson Robert A.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Powers, Jr. J. F.
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