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US 4,392,404 AGranted
Cutting head for glass cutting machine
AssigneeSaint-Gobain Vitrage
InventorsNorbert Schwarzenberg, Heinz Ueberwolf, Jakob Kaesmacher
Life of this patent
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AssigneeSaint-Gobain Vitrage
InventorsNorbert Schwarzenberg, Heinz Ueberwolf, Jakob Kaesmacher
Estimating the term…
A cutting head for a glass cutting machine includes a cylinder, a piston movable in the cylinder in one direction to a cutting plane under control of compressed air from a source communicated to the cylinder to act on an upper face and move the piston in opposition to a bias force, a rod attached to and movable with the piston and a cutting wheel carried at the end of the rod for cutting a glass sheet from a glass blank. A port is formed through the wall of the cylinder and means connected to the port responsive to a rapid rise in pressure function rapidly to isolate the cylinder from the source of compressed air and to vent the cylinder. During a cutting operation, the piston seals the port. If the cutting wheel should move beyond the extremes of the glass blank or for any reason move further in the one direction, following movement of the piston shall open the port and the cutting wheel will rapidly retract to and beyond the cutting plane without damage to the cutting wheel.
A cutting head for use in a glass cutting machine comprising a cylinder, a piston adapted for movement in the cylinder in one direction in response to pressure from a source acting on an upper face, the movement of the piston being in opposition to means exerting a continuous force on the piston lower face tending to move the piston in the opposite direction, a rod connected at one end to the piston lower face, a cutting tool mounted on the rod at the other end to provide a cut in a glass blank along a prescribed path, means communicatingthe source of pressure to the cylinder for moving the piston in the one direction thereby to locate the cutting tool in a working position at a cutting plane, and means suppressing the pressure from the source acting on the pistion upper face and enabling rapid movement of the piston in the opposite direction under control of the force exerting means should the cutting tool move further in the one direction from the working position.
In combination with a glass cutting machine, a cutting head comprising a cylinder, a piston adapted for movement in the cylinder in one direction in response to pressure from a source acting on an upper face, the movement of the piston being in opposition to means exerting a continuous force on the piston lower face tending to move the piston in the opposite direction, a rod connected at one end to the piston lower face, a cutting tool mounted on the rod at the other end to provide a cut in a glass blank along a prescribed path, means communicating the source of pressure to the cylinder for moving the piston in the one direction thereby to locate the cutting tool in a working position at a cutting plane, and means suppressing the pressure from the source acting on the piston upper face and enabling rapid movement of the piston in the opposite direction under control of the force exerting means should the cutting tool move further in the one direction from the working position.
Dependencies are inferred from the claim text.