US 4,226,153 AGranted

Compensating glass scoring head

AssigneeThe Fletcher-Terry Company

InventorThomas A. Insolio

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Abstract

A glass scoring head which compensates for variation in the flatness of the glass to provide a score of uniform depth as it traverses the glass has an outer body adapted to be mounted in four possible positions to a bridge or the like to score glass in four different directions. This support body defines an air cylinder with an elongated annular piston means movably mounted therein. A pair of pressure rollers are journalled on the lower end of the piston means to bear on the glass with a force proportional to the air pressure in this cylinder. An elongated support tube is slidably mounted inside the annular piston means, and a second air cylinder urges the tube downwardly to supplement a spring acting between the second air cylinder piston and the tube. The glass scoring wheel is mounted in the lower end of the elongated tube, and threaded stop nuts are provided on the annular piston and on the support tube to adjust the down limit position of these pressure rollers, and the differential spacing between these rollers and the scoring wheel.

Claims9

Dependent claims

Apparatus for scoring sheet glass, comprising a support body adapted for relative movement in a plane generally parallel to the glass to be scored, piston means in said support body and adapted for limited reciprocating movement on a line oriented perpendicular said plane, glass scoring wheel support means reciprocably mounted in said piston means for limited movement on the same line of action as that of said piston means, a glass scoring wheel rotatably mounted in said reciprocable wheel support means for limited angular castering action on the said line of action, at least one glass contacting pressure roller mounted to said piston means for rotation on an axis oriented parallel to the axis of rotation of said glass scoring wheel and said roller axis intersecting said line of action for said piston means and said scoring wheel support means, biasing means acting between said support body and said piston means to provide a predetermined pressure for said roller to exert on the glass, and biasing means acting between said piston means and said scoring wheel support means to provide a cutting force for the scoring wheel which is independent of the pressure of said roller on the glass and also independent of relative motion between the support body and said piston means due to unevenness in the glass surface being scored.

Dependencies are inferred from the claim text.