Qwint Systems, Inc.

Robert C Hoffman

Donald P Martin

Richard H Kruse

Inked tape cartridge

Teleprinter

A dot matrix-type print head for forming a character-defining array of individual dots on a print-receiving surface includes a plurality of parallel-spaced print wires arranged in a vertical plane perpendicular to the print receiving surface. The print wires are individually actuated by respective actuator assemblies which each include a stationary portion consisting of an end plate, a bobbin, a solenoid winding, and a spring, and a movable portion consisting of a magnetic armature attached to the associated print wire. Upon energization of the solenoid winding the resulting magnetic flux displaces the magnetic armature and causes the print wire to impact the print-receiving surface. A frame comprising two parallel-spaced side plates maintains the stationary print head components in alignment, and progressive vertical displacement of the actuator assemblies within the plane of the print wires to align with respective print wires enables the actuator assemblies to be formed from identical components for manufacturing economy.

Dot matrix print head

A teleprinter includes a carriage for conveying a dot matrix-type print head along an operating path parallel to a print-receiving surface. The carriage is mounted on parallel-spaced support rods by means of spaced bearings slidably engaged to one of the support rods, and a pair of perpendicularly-aligned guide rollers which engage the other guide rod. The carriage is advanced by a drive belt which extends along the carriage operating path and is attached to the carriage at either end. A stepper motor coupled to one of the pulleys drives the belt to position the carriage. A removable cartridge on the carriage contains an inked ribbon which is advanced with movement of the carriage by a drive gear engaged to the drive belt. A unidirectional clutch prevents the inked ribbon from moving in a reverse direction during carriage return.

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Park Ridge, IL, United States of America

Robert C Hoffman