Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Patent
1979-06-04
1981-09-08
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
100 33PB, 156389, 156497, 156499, 156502, 156522, 1565831, B30B 1534, B65B 1332
Patent
active
042882702
ABSTRACT:
There is disclosed a strapping machine for applying a plastic strap around an object, tensioning the strap and heat-sealing together overlapping portions of the strap, including a retractable heating member movable between the overlapping strap portions and a pressure-applying means including a pressure block with a tiltable universal joint coupling for pressing the overlapping strap portions against the heating element with a first relatively light pressure to melt the facing surfaces thereof. The heating element is withdrawn while the pressure-applying means presses the strap thereagainst with the first pressure, and then the melted strap portions are pressed together with a strong second pressure to complete the seal. A cam with a yieldable section controls the first pressure and a compression spring controls the second pressure. While retracted, the heating element is raised to a higher temperature for burn-off of strap residues. Switch means disposed in the strap path provide a positive stop to prevent strap overfeed while a yieldable track section permits escape of excess strap from the path to prevent jamming. Air filter means remove waste products of the heat-sealing operation.
REFERENCES:
patent: 2825930 (1958-03-01), Gaillard
patent: 3269300 (1966-08-01), Billett
patent: 3293099 (1966-12-01), Stark
patent: 3368323 (1968-02-01), Wood
patent: 3438833 (1969-04-01), Nakano
patent: 3759169 (1973-09-01), Goodley
patent: 3914153 (1975-10-01), Sato
patent: 3944460 (1976-03-01), Karr
patent: 4016023 (1977-04-01), Takami
patent: 4058053 (1977-11-01), Paterson
patent: 4157274 (1979-06-01), Johnson
Interlake Instruction Manual, G18 Strapping Head, Form 1256, 1976.
Middleton Charles G.
Mossell Alan T.
Simmons James R.
Interlake, Inc.
Wityshyn Michael G.
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