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US Patent: 633,280
Die and Tool for Upsetting Tubes
Patentee:
John R. Blakeslee (exact or similar names) - Cleveland, Cuyahoga County, OH

USPTO Classifications:
29/DIG.43, 72/343, 72/467, 72/478

Tool Categories:
metalworking machines : forging machines : forging dies
metalworking machines : forging machines : forging apparatus and accessories

Assignees:
Ajax Manufacturing Co. (Cleveland) - Cleveland, Cuyahoga County, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 09, 1898
Granted: Sep. 19, 1899

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Ajax Manufacturing Company
Description:
Claim:

Heretofore in upsetting boiler-tubes and analogous articles in dies two difficulties have presented themselves: First, the male die becomes so tightly wedged in the article to be upset as to withdraw the article with the male die as the latter is withdrawn, and, second, it has been found almost impossible to avoid crimping, wrinkling, corrugating, or or what is known as "cold-shutting" on the part of the upset portion of the tube.

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