Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making articles of indefinite length
Patent
1985-04-17
1986-04-22
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making articles of indefinite length
419 4, 419 8, 419 30, 419 31, 419 38, 419 43, 419 66, 419 69, 228126, 228131, 228132, 29 33D, 29 33F, 29DIG3, 72369, 428558, B22F 500
Patent
active
045841691
ABSTRACT:
In the installation, a strip is shaped from a split tube which is welded or seamed to give a closed tube in a welding or seaming station. Associated with the welding or seaming station is a suction mechanism used for the removal of on the one hand the cold air flow produced by the moving open tube and on the other the air flow heated during welding and flowing back from the closed tube, as a result of the reduction of the internal cross-section thereof. This obviates air turbulence in the welding or seaming station, which could whirl up the pulverulent material introduced into the open tube in a dosing station and could be deposited on the longitudinal edges of the split tube. This could unfavorably influence the seaming or welding process.
REFERENCES:
patent: 3226814 (1966-01-01), Leib et al.
patent: 3452419 (1969-07-01), Hillert
patent: 4203188 (1980-05-01), Blanpain et al.
patent: 4224085 (1980-09-01), Brendel et al.
patent: 4235007 (1980-11-01), Yamaji et al.
patent: 4305197 (1981-12-01), Puschner et al.
Pfenninger Heinz
Werner Alexander
Lechert Jr. Stephen J.
Schweissindustrie Oerlikon Buhrle AG
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