Multiple speed web drive system
AssigneePako Corporation
InventorGerald R. Strunc
Life of this patent
Estimating the term…
Abstract
A film or paper drive system for use in photographic film or paper cutters allows the operator to position the film or paper accurately and rapidly by actuating a switch. The film or paper is driven a predetermined distance at a first rate in response to actuation of the switch. If the switch remains actuated after a first period, the film or paper is driven at a second rate. If the switch still remains actuated after a second period, the film or paper is driven at a third, higher rate.
Claims19
In a photographic system, a web drive system comprising:
- switch means having first and second states, the switch means normally having the first state and having the second state only while being operator actuated, the switch means returning to the first state when opertor actuation is removed;
- and
- web drive means for driving the web a predetermined distance at a first rate during a first period in response to the switch means being switched from the first to the second state, discontinuing driving the web after the predetermined distance if operator actuation is removed during the first period causing the switch means to return to the first state, and driving the web at a second rate after the first period if operator actuation continues uninterrupted throughout the first period and thereafter so that the switch means remains in the second state continuously throughout the first period and thereafter.
In a photographic system, a web drive system comprising:
- switch means having first and second states;
- and
- web drive means for driving the web a predetermined distance at a first rate during a first period in response to the switch means being switched from the first to the second state, and driving the web at a second rate if the switch means remains in the second state after the first period, the web drive means comprising:
- stepper motor means for driving the web in steps;
- oscillator means for providing an oscillator signal;
- and
- stepper motor control means for limiting the stepper motor means to a predetermined number of steps during the first period and permitting the stepper motor means to step at a rate determined by the frequency of the oscillator signal if the switch means remains in the second state after the first period.
A web drive system for driving a web of photographic material, the web drive system comprising:
- switch means;
- stepper motor means for driving the web in steps;
- oscillator means for providing an oscillator signal;
- and
- stepper motor control means for limiting the stepper motor means to a predetermined number of steps during a first period following actuation of the switch means and permitting the stepper motor means to step at a rate determined by the frequency of the oscillator signal if the switch means remains actuated after the first period.
Dependencies are inferred from the claim text.