Donald I Loofbourow

41038460, Aug 1, 1978

Mar 23, 1977

5/780647

Donald I. Loofbourow - Canby OR
Robert E. Lach - Beavertown OR

GAF Corporation - New York NY

G03B 104
G11B 1532

242205

A film web handling mechanism includes a motor for driving the mechanism, and an endless belt for transferring the motor drive to a supply pulley, a take-up pulley and a shuttle-shuttle drive pulley. The supply pulley and the take-up pulley are connected, through a supply clutch and a take-up clutch, to a supply spindle and a take-up spindle. The endless belt is driven in one direction only by the motor, however, the supply and take-up spindles are capable of moving the film web in both a forward and reverse direction. The forward and reverse direction capability of the supply and take-up spindles is accomplished by varying the amount of motor drive transferred to the spindles through the clutches. By means of a single control knob linked to the supply clutch and to the take-up clutch, an operator is able to select a mode of operation.

54423872, Aug 15, 1995

Jun 23, 1993

8/082209

Donald I. Loofbourow - Lake Oswego OR
Richard G. Chambers - Portland OR

Tektronix, Inc. - Wilsonville OR

B41J 2175

347 88

A triggerable ink transfer system that simultaneously transfers ink from a plurality of ink preload chambers to corresponding load chambers and ink reservoirs is disclosed. The delivery system permits an untrained operator to safely load ink without inadvertently interchanging different types (e. g. colors) of ink, and without inadvertently overfilling any of the ink reservoirs. A processing unit that coordinates ink delivery system monitoring and control features is in communication with an operator interface unit that provides ink loading instructions to the operator.

52238601, Jun 29, 1993

Jun 17, 1991

7/716567

Donald I. Loofbourow - Lake Oswego OR
Richard G. Chambers - Portland OR

Tektronix, Inc. - Wilsonville OR

B41J 2175

346140R

A triggerable ink transfer system that simultaneously transfers ink from a plurality of ink preload chambers to corresponding load chambers and ink reservoirs is disclosed. The delivery system permits an untrained operator to safely load ink without inadvertently interchanging different types (e. g. colors) of ink, and without inadvertently overfilling any of the ink reservoirs. A processing unit that coordinates ink delivery system monitoring and control features is in communication with an operator interface unit that provides ink loading instructions to the operator.

D2577704, Jan 6, 1981

Sep 22, 1978

5/944908

Donald I. Loofbourow - Canby OR

GAF Corporation - New York NY

D1401

D14 11

41696670, Oct 2, 1979

Mar 23, 1977

5/780536

Donald I. Loofbourow - Canby OR
Robert E. Lach - Beaverton OR

GAF Corporation - New York NY

G03B 156

352159

A film buffer for motion picture projectors is provided to permit the smooth advancement of the film through a projection gate, and to serve as a shock absorber to insure even projection. The buffer comprises a pair of rollers in fixed relation to each other juxtaposed to form a loop in the film in its path of travel, from a film supply reel to a film transport mechanism for incrementally advancing each frame of the film past the projection gate, a bracket for holding said rollers pivotally mounted on the face of the projector at a mid-point between the two rollers to permit swinging movement to increase or decrease the film loop size depending upon the tension of the film, a counterweight fixedly connected to the bracket to pivotally bias the same into a position to increase the film loop size, and a torsion spring positioned beneath the counterweight to engage and cushion the same as it moves toward a rest position. When the tension of the film varies only as a result of the intermittent operation of the film transport mechanism, the film loop tightens and loosens around the rollers and thereby employs the inherent elasticity of the film to urge the film from the supply reel in a smooth and uninterrupted manner. If the tension of the film increases due to a jam in the supply reel or the like, the inertia of the counterweight will be overcome allowing the bracket to swing into a position to reduce the loop size.

41451279, Mar 20, 1979

Mar 23, 1977

5/780646

Donald I. Loofbourow - Canby OR
Robert E. Lach - Beavertown OR

GAF Corporation - New York NY

G03B 4100
G03B 148

352 79

A modular film transport and control mechanism for selectively advancing either regular 8mm or super 8mm perforated motion picture film through a projection gate is provided. The module comprises a film transport shuttle having a film engaging claw biased for engagement with the perforations of the film, a rotatable drive cam in operative engagement with the shuttle to reciprocally move the claw along horizontal and vertical paths to advance the film through the projection gate, and a pivotally mounted projection mode shifter interposed between the shuttle and the cam to transmit the desired horizontal motion from the cam to the shuttle, and selectively movable between at least two positions along a surface of the cam to change the mode of operation from normal projection to still projection. A control linkage connected to the shifter permits manual selection of the desired operating mode. The module also comprises a rotatable shutter mounted on a common shaft with the shuttle drive cam.