The United States of America As Represented by the Administrator of the

Benson

Precision Image Corporation

David J Devine

Gene F Day

Ronald B Finley

Robert L Nieto

Joseph B Camacho

Gordon J Deboo

A simplified color printing system and method is disclosed in which the printing system has a single applicator that is supplied with toner fluids or inks of different colors. The printing system is simplified by having a single pump employed in association with the applicator. Use of a single pump is made possible, because during a color change the pump and applicator are purged with air both before and after a wash fluid is circulated. The single pump is used to pump both the imaging fluids and the air. The present invention has application in both color electrostatic printers and copiers, and in color ink-jet printers.

One-pump color imaging system and method

An assembly for mounting a roll of paper or Mylar.RTM. film having a hollow core includes a radially expanding core insert at each end of the roll and a core insert support, mountable to a support structure, to support, position and apply a drag force to the paper roll. Each core insert has a radially expandable inner end which is expanded within the core to secure the insert in place. The outer end of the core insert extends beyond the edge of the paper roll. The core insert support includes a pair of arcuate contact surfaces and an adjustable spring biased brake shoe mounted to a frame. The brake shoe presses the outer end of the core insert against the contact surfaces to create a suitable drag on the paper roll. A flipper is pivotally mounted to the frame for movement between free movement and blocking positions to permit or prevent the core inserts from being removed from the core insert supports. Each flipper also axially biases the core insert towards the other flipper. One flipper presses on the paper roll substantially harder than the other so the paper roll is constantly biased to one side to aid proper positioning of the paper.

Mounting assembly for a roll of material

A test apparatus for locating electrical shorts that is especially suited for use while an electrical circuit is being fabricated or assembled. A ring counter derives input pulses from a squarewave oscillator. The outputs of the counter are fed through transistors to an array of light emitting diodes. Each diode is connected to an electrical conductor, such as a bus bar, that is to be tested. In the absence of a short between two electrical conductors the diodes are sequentially illuminated. When a short occurs, a comparator/multivibrator circuit triggers an alarm and stops the oscillator and the sequential energization of the diodes. The two diodes that remain illuminated identify the electrical conductors that are shorted.

Test apparatus for locating shorts during assembly of electrical buses

Growing community of inventors

San Jose, CA, United States of America

David J Devine