US Patent: 849,329 - Manufacture of cutting-disks


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US Patent: 849,329

Manufacture of cutting-disks

Patentee:

William U. Colthar (exact or similar names) - Springfield, OH

USPTO Classifications:

172/604, 29/891, 72/340, 76/115, 82/1.11

Tool Categories:

specialty machines : paper cutting machines

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 10, 1904
Granted:	Apr. 02, 1907

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Victor Vise Co.

Description:

See patent 804,520 for the probable target of the cutting disks to be manufactured. The process of this patent consists of three steps to produce cutting disks with the cutting edge in line with one of the faces of the disk. First, flat disks are cut from a sheet of steel by a stamping press or other means. Second, the circumferential rim of the disk is bent down, and third, the resulting disk is ground flat on the concave side until a sharp cutting edge is achieved (the inner part of the disk is preferably left untouched so that the cutting side of the disk remains slightly hollow.