Innovative Automation, Inc.

D'addario & Company, Inc.

Steven T Murray

James D'Addario

Richard K Drumm

A drumhead comprising a circular membrane having a flat central play region, a collar extending outwardly and downwardly from the play region, and an outer edge region extending from the collar. A hoop defines a circular channel in which the outer edge region of the membrane is retained. The collar has a convexly curved region having upper and lower ends spanning an included angle, with the upper end transitioning tangentially into the play region and a frustoconical skirt region flaring outwardly from the lower end of the curved region and transitioning into the outer edge area. The included angle of the convexly curved region is about 90 deg., and the skirt and outer edge region of the membrane frustoconically extend from the lower end of the curved region to the channel of the hoop, at a substantially uniform angle in the range of about 10 to 30 deg.

Drumhead with extended collar

A drumhead mold and process for making a plastic drumhead. The mold is structured to heat the drumhead collar area and maintain the battering surface cool to provide a drumhead with improved performance characteristics.

Mold and process for producing drumhead membranes

An automated tube filling machine and process having a plurality of work stations, a rotating disc to deliver the tubes to the work stations and a central processing unit to control implementation of the work stations and rotation of the disc.

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Oak Beach, NY, United States of America

Steven T Murray