Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-04-07
1976-05-25
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156500, 264167, 425 72S, 4251331, 425382N, 425464, B29B 504
Patent
active
039590577
ABSTRACT:
A means and method for producing plastic netting wherein a hot pneumatic fluid such as nitrogen is used to blow filaments of one circular row of plastic filaments into contact with another circular row of plastic filaments which rows are concentric with each other and being rotated in opposite directions by a respective pair of counter-rotating dies. The hot pneumatic fluid is preferably an inert gas such as nitrogen and serves to anneal the plastic at the weld intersections of the filaments as well as to prevent oxidation during the period when the filaments are quite hot. The means disclosed herein comprises a pair of concentric relatively rotatable dies each having a circular row of plastic extrusion orifices, the dies being adapted to rotate in opposite directions and the rows of orifices being in close proximity to each other and means for projecting hot pneumatic fluid is carried by one of the dies and the hot pneumatic fluid is directed to filaments extruded from a circular row of orifices of the same die which carries the means for projecting the hot pneumatic fluid toward the extruded plastic filaments. Additionally, the individual plastic extrusion orifices are generally aligned axially with individual jet openings through which the hot pneumatic fluid is directed laterally against the filaments of one of said circular rows so that such filaments are blown into weld contact with the plastic filaments extruded from the other circular row of extrusion orifices carried by the other die.
REFERENCES:
patent: 3308220 (1967-03-01), Smith
patent: 3538545 (1970-11-01), Smith
patent: 3551236 (1970-12-01), Fairbanks
patent: 3737508 (1973-06-01), Weir
patent: 3814559 (1974-06-01), Akers et al.
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