Electric heating – Metal heating – Of cylinders
Patent
1977-10-31
1979-07-24
Reynolds, Bruce A.
Electric heating
Metal heating
Of cylinders
219 79, 198732, 228 49, 113 11R, B23K 116, B65G 1900, B21D 5126, B23K 3704
Patent
active
041623827
ABSTRACT:
A transport device for use with an electrical resistance welding machine producing longitudinal seams at workpiece bodies or the like which, prior to reaching the welding rolls of the machine, are transported at a desired welding speed by means of the transport device. The transport device comprises at least one endless chain revolving above the workpiece bodies to be transported and having workpiece body-engaging members in the form of pawls hingedly connected in spaced relationship with the endless chain. Each pawl has oppositely extending pawl arms, of which one arm possesses a contact or impact surface intended to bear against the end of a workpiece body engaged thereby and the other arm possesses a control surface which bears against a guide rail stationarily arranged above the lower chain run of the endless chain which revolves over at least two sprocket wheels. The guide rail is constructed at both ends of a linear section thereof so as to have two sections extending in an arc-shaped or curved configuration at the region of the sprocket wheels in such a manner that upon arrival of a pawl in a workpiece feed plane the pawl arm having the contact surface is pivoted in a controlled manner into its workpiece-engagement position and upon departure of the pawl out of the feed plane the contact surface of such pawl arm retains its essentially vertical position with regard to the direction of transport of the workpiece body.
REFERENCES:
patent: 2353474 (1944-07-01), Kiehn
patent: 3255945 (1966-06-01), Sillars
patent: 3590203 (1971-06-01), Gieffers et al.
patent: 3627106 (1971-12-01), Winfield
Brown Charles E.
Fael S.A.
George Keith E.
Reynolds Bruce A.
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