Marvin R Roberts

US Patent:

42158273, Aug 5, 1980

Filed:

Jun 25, 1979

Appl. No.:

6/051827

Inventors:

Marvin A. Roberts - Calabasas CA
Joseph C. Wary - Sepulveda CA

International Classification:

B65H 7500
B65H 1742

US Classification:

242 5501

Abstract:

An apparatus is described herein which when used in conjunction with a continuous film duplicator or printer, stores and transports micrographic, motion picture, and other masters during the printing cycle to eliminate rewinding when making multiple duplicate copies. The apparatus is modular utilizing a pair of carriages so that it may be expanded either horizontally or vertically to accommodate more footage. A single motor is employed to adjust the spacing between top and bottom roller sets disposed on the carriages for various lengths of film while a three-position sensor arm controls the motor. A slack sensor controls the speed of rollers mounted on shafts on the carriages and a motor drives each shaft controlled by the sensor. Low-mass plastic film rollers equipped with soft-touch rubber surfaces are employed for transporting the film and low inertia PM motors provide high acceleration and torque for driving the shafts. A transparent enclosure houses the above mechanisms and film that travels through the enclosure and suitable electronic circuitry is provided for sensing, driving, and controlling the various functions while operating at speeds up to and exceeding 1500 ft/min.

US Patent:

43502784, Sep 21, 1982

Filed:

Oct 27, 1980

Appl. No.:

6/200883

Inventors:

Marvin A. Roberts - Canoga Park CA

International Classification:

B65H 1720

US Classification:

226190

Abstract:

A drive puck for use as a component in a demand drive system is disclosed herein in which a film roller is resiliently centered on a rotating drive shaft so that the tension of a film strip carried thereon selectively causes engagement of the film roller with the drive puck. The puck is secured to the drive shaft so as to rotate therewith and is provided with an external tread which projects into a lateral cavity of the film roller so as to engage with the underside of the film roller in response to the resilient centering movement of the film roller.

US Patent:

40221873, May 10, 1977

Filed:

Nov 24, 1975

Appl. No.:

5/634858

Inventors:

Marvin A. Roberts - Reseda CA

International Classification:

F24J 302

US Classification:

126271

Abstract:

A solar heating apparatus is disclosed herein useful as a swimming pool cover whereby the sun's rays can penetrate the apparatus and heat the water therebeneath. The apparatus includes a plurality of individual and separate units of a predetermined geometry which cooperate with each other to cover a given body of water. Each unit includes an upper panel of transparent, plastic material and a bottom panel of opaque, plastic material. The panels are joined at peripheries to provide an integral unit and spacers or ribs are provided to maintain separation between the opposing panel surfaces so that a thermal compartment is defined therebetween. In one form, the bottom panel may be a continuous strip of plastic material shared in common with separate top panels.

US Patent:

42893232, Sep 15, 1981

Filed:

Aug 10, 1979

Appl. No.:

6/065536

Inventors:

Marvin Roberts - Van Nuys CA

International Classification:

A63C 1714

US Classification:

280 1121

Abstract:

A wheel for a skating apparatus is operably carried on a truck so as to selectively rotate in a given direction or in both directions. A bearing assembly rotatably mounts the wheel on one end of an axle outwardly projecting from a skate truck. The bearing assembly includes a pair of races between which bearings are rollably disposed. An adjustable bearing assembly is operably coupled between the opposing surfaces of the truck and the inside of the wheel. Bearings in this latter assembly are rollable in a circular cage having the bearing surfaces engagable with a flat raceway carried on the truck wherein the wheel rotates in a first direction when the bearing engages with a circular portion of an eccentric and ceases rotation when the bearing engages with a flattened ramp portion of the eccentric. In an alternate embodiment the first mentioned bearing assembly includes the eccentric raceway on one side of the cage holding the bearings and the flat surface race on the opposite side.