Abstract: A method and apparatus for injection molding styrene phonograph records and the like. Through use of special fixtures and the careful control of time, temperature and pressure during the molding process in accordance with the method of the invention, the height, width, angle and side wall configuration of the groove of monophonic, sterophonic or quadraphonic record masters can be precisely replicated in the molded records, thereby enabling high volume production of injection molded styrene records of superior quality.

Abstract: An electrically operated copyholder is disclosed wherein a line guide extending transversely of copy matter supported on a face plate is removably mounted on an endless driving element, such as a belt, which is driven by a motor controlled by a typist, thereby to move the line guide automatically across the material to be copied line by line.

Abstract: A power operated copyholder is disclosed wherein a face plate, on which one or more copy sheets containing matter to be copied by a typist is mounted, moves upwardly one or more lines at a time while being viewed and copied by the typist. An adjustable line guide remains stationery with respect to the copy matter, and movement of the face plate is controlled by the typist either by hand or by a foot pedal. Spring activated paper holders are provided which are adjustable to suit the width of the copy matter being copied. Tension on the line guide may also be adjusted for the amount of paper being used and is adjustable also for a proper light angle. A novel form of adjustment is also provided for the purpose of adjusting the angle of the face plate with respect to a vertical plane, for the comfort of the typist.