Abstract: Apparatus for use in the adhesion measurement of an adhesive sheet comprising a standard surface to be sticked with a main portion of the adhesive sheet, a take-up roller for pulling and taking up the free end portion of the sheet while peeling the sticked sheet portion from the standard surface by the rotation thereof, a source of driving force for rotating the take-up roller, and a torque meter interposed between the source of driving force and the take-up roller for generating torque signals corresponding to the adhesion of the adhesive sheet. The apparatus further includes: a base table extending in parallel with the standard surface; and track rolling members operatively connected to the take-up roller and mounted to a machine frame supporting the take-up roller, the torque meter and the source of driving force, and the rolling members being adapted to roll on the standard surface at the same speed with the peripheral speeed of the take-up roller.

Abstract: A method and apparatus for measuring the orientation of the constituents of sheets are disclosed. The method comprises the steps of inserting a sheet into a small clearance with which the openings in a pair of waveguides are opposed to each other to form a cavity resonator, producing a relative motion at a constant speed between the sheet and the resonator while emitting linearly polarized microwaves from the upper waveguide to allow them to fall on the sheet at right angles thereto, measuring the amount of attenuation of the microwaves by the lower waveguide, and determining the orientation of the constituent of the sheet from that angle of the sheet with respect to the plane of polarization of the microwaves which gives the maximum attenuation.

Abstract: A laser thermal printer is disclosed. The printer comprises a CO.sub.2 gas laser light source, a modulator for the laser beam from said laser source, an optical scanning system for scanning the laser beam, which is passed through said modulator, transversely of a predetermined recording surface while focusing it on said surface, and a web feed mechanism for feeding a heat-sensitive recording web, which presents said recording surface, in a direction at right angles with the direction of said beam scanning.