Abstract: A light table for use in tracing drawings, figures and the like includes a molded unitary housing structure forming an open top chamber with a peripheral support frame on which is mounted a transparent planar sheet or panel of glass or similar support material covering the majority of the open top with a tool tray disposed at one end of the housing for containing artists' or draftsmens' tools and instruments, and adjustable legs are positioned at the four corners of the housing and are adjustable to adjust the slope of the table and to define a right or left handed orientation of the table.

Abstract: A printing press washer with an elongated tray having a roller engaging wiper blade extending along a front edge for engaging the surface of the lower oscillating roller of an offset lithographic printer, a pair of hanging brackets having hanging hooks for hooking over a transverse tie bar below the ink fountain, and adjusting screws for engaging the frame of the machine for adjusting the wiper blade engagement and pressure on the lower oscillating ink roller of a printing press.

Abstract: A machine for imprinting numbers on sheets of paper, particularly in a consecutive order, includes a base in the form of a box-like housing in which is located a levelling mechanism for levelling a platen against which sheets of paper are supported for imprinting a number by means of an imprinting head supported for reciprocal movement toward and away from the platen by means of an arm extending upward from the base member and including a solenoid for reciprocal movement of the print head toward and away from the platen. The level of the platen for precisely adjusting the support surface of the platen for uniformly printing the numbers includes a pair of adjustable screw mechanism disposed on orthogonal axes for selectively adjusting the slope of the platen. An alternative embodiment includes a solenoid operated plunger acting against a fixed platen disposed in the center of a sheet support table.

Abstract: A powder spray attachment for printing presses for mounting above the delivery tray comprises a cylindrical tube having a plurality of ports along the length thereof for mounting transverse to the delivery tray with a plurality of movable clamps on the tube for selectively closing selected ports for delivery of powder at selected positions along the width of sheets of paper delivered to the delivery tray.

Abstract: A machine for imprinting numbers on sheets of paper, particularly in a consecutive order, includes a base in the form of a box-like housing in which is located a levelling mechanism for levelling a platen against which sheets of paper are supported for imprinting a number by means of an imprinting head supported for reciprocal movement toward and away from the platen by means of an arm extending upward from the base member and including a solenoid for reciprocal movement of the print head toward and away from the platen. The level of the platen for precisely adjusting the support surface of the platen for uniformly printing the numbers includes a pair of adjustable screw mechanisms disposed on orthogonal axes for selectively adjusting the slope of the platen. An alternative embodiment includes a solenoid operated plunger acting against a fixed platen disposed in the center of a sheet support table.