Metal deforming – Process – Deforming sheet metal
Patent
1974-10-31
1976-04-27
Larson, Lowell A.
Metal deforming
Process
Deforming sheet metal
72381, 113116F, 113116V, B21D 1120
Patent
active
039525740
ABSTRACT:
A new process of folding sheet metal to form various kinds of structures. The characteristic feature of each of the structures capable of being formed by the invention is that they are developable without slitting and have at least two adjacent surface segments which together, or in combination with each other if more than two are present, form a complex surface, developable without slitting. The structure consists of one or more of the types of surfaces known as plane, cylindrical, conical and convolute surfaces arranged in such relation that straight bend lines upon the complex surface and the images thereof when projected on the pattern meet within the confines of the surface and pattern at other than a straight line extending from edge to edge of the complex surface and pattern, respectively. A specific form of the apparatus particularly adapted for carrying out the process also is disclosed. The principles of this apparatus may be used to form various useful objects, by the method described and claimed.
REFERENCES:
patent: 1153313 (1915-09-01), Katzinger
patent: 1722177 (1929-07-01), Combemale
patent: 2021118 (1935-11-01), Tinkham
patent: 2244912 (1941-06-01), Kollander
patent: 2591439 (1952-04-01), Koch
patent: 2950656 (1960-08-01), Gewiss
patent: 3862562 (1975-01-01), Kruger
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