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US 4,046,299 AGranted
Glass cutting method
OwnerJohn G. Swartzfagerinventor
Life of this patent
Estimating the term…
Abstract
A glass cutting tool having arms offset from the head portion of the tool and engageable with the sides of a tubular workpiece. A cutting element on the tool head is constrained for linear passage along the workpiece by at least one of the arms. Provision is made for extension or retraction of the arms relative to the tool head while additional provision is made for varying the effective distance between an arm and the cutting element. A method is also disclosed for the cutting of glass tubes.
Claims2
The method of lengthwise severing a glass tube of rectangular section, said method consisting of the steps of,
- lengthwise scoring the minor sides of the tubular member,
- applying inward pressure to a major side of the rectangular member to impart both tension and compression forces to glass zones located adjacent the lengthwise scorings to separate the glass tube into boat shaped pieces.
Dependencies are inferred from the claim text.