Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1984-07-18
1986-06-24
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
291568R, 72299, 72371, 72379, B23P 1504, B21D 5378
Patent
active
045960640
ABSTRACT:
A method and apparatus for manufacturing the screw flight section of a screw conveyor is disclosed. The apparatus includes two horizontal arms which extend from a vertical support and at the terminal end of these arms there are dies for engaging the inner and outer peripheral edges of a flat, sheet metal, annulus-shaped blank with a radial slit. One die is turned on its longitudinal axis while the other remains stationary so that the blank is twisted. After the blank is circumferentially displaced relative to the dies, it is again twisted in the above described manner. This procedure is repeated around the entire circumference of the blank with the result that a helical form is applied to the blank.
REFERENCES:
patent: 649700 (1900-05-01), Lorenz
patent: 651748 (1900-06-01), Dierdorff
patent: 2760255 (1956-08-01), Compton
patent: 3485116 (1969-12-01), Fender
patent: 3505852 (1970-04-01), Sassak
patent: 3566501 (1971-03-01), Winchester
patent: 3580039 (1971-05-01), Heinonen
patent: 3667276 (1972-06-01), Moodey
patent: 3708060 (1973-01-01), Ben-Natan
E. J. Stefanides "Conveyor Flights are Twisted to Helical Shape" Design News, Dec. 5, 1983, pp. 101-103.
Crane Daniel C.
Koppers Company Inc.
Long Daniel J.
Zeh, Jr. Herbert J.
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