Patents Assigned to Dexter-Lawson Products Limited
  • Paper drill
    Patent number: 4632611
    Abstract: A drill for a paper drilling machine. The drill is made of two separate parts, namely a cutting bit of hollow generally cylindrical form having an annular cutting edge at one end, and a hollow cylindrical sleeve which receives the opposite end portion of the bit and which is itself received in a collet assembly of a drill spindle of the machine. The sleeve is radially compressible and is compressed by the collet assembly to frictionally grip the bit and permit transmission of drilling torque from the drill spindle to the bit in use.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: December 30, 1986
    Assignee: Dexter-Lawson Products Limited
    Inventor: Robert J. Burns