Data Products Corporation

Thomas A Dobson

Peter H Wolf

Rafael Rozo

The impact pins of a matrix printhead are brazed by a laser to a print hammer of the flat spring type. The print hammers are then attached to a printhead mounting block adjacent to each other with the impact pins in substantially a straight line. The attached print hammers are then shaped by an electric discharge machining (EDM) process by a single electrode to simultaneously machine the impact pins to the desired shape and to position the tips of the impact pins at a precise distance with respect to one another.

Print hammer assembly method

A type bearing band assembly for use in a high speed impact printer comprising a flexible band having a plurality of cylindrical slugs secured to the band outer surface and extending across the width thereof. Each slug has end faces which open into bores or cavities extending axially into the slug. A plurality of type modules are provided, each including a head having front and rear faces. One or more raised type characters are formed on each module front face. A shank extends from each module rear face through a slug end face and is secured in the slug cavity.

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Canoga Park, CA, United States of America

Thomas A Dobson