Device for forming graphics

• US 4,266,863 A
• Filed: 12/17/1979
• Issued: 05/12/1981
• Est. Priority Date: 12/17/1979
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Hollingsworth, Elmont E., Shea, Wm. M., Spitzer, Daniel M. Jr.
• Primary Examiner(s): Griffin, Donald A.
• Application Number:
  US06/104,575
• Time in Patent Office: 512 Days
• Field of Search: 354/5-17
• US Class Current: 396/558
• CPC Class Codes: G03B 27/04 Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box
• CPC Class Codes: G03B 27/28 Edge-masking devices

Abstract

A device for composing graphics comprising a flash lamp for irradiating portions of strip material through a template when an arm supporting the lamp is moved to an exposure position at an exposure station. The template is pressed against the strip at the exposure station between a resilient frame-mounted pad and a transparent plate on the lamp arm by a toggle linkage between the frame and the arm. The template has a rectangular array of windows and is manually positionable on locating pins at the exposure station for different exposures. A positive image of each window is provided on the template, and the locating pins are movable via movement of the lamp arm from a preview position where the image is at the exposure station so the operation can see where the graphic will be formed to an exposure position with the associated window located at the exposure station for exposure. The template also has a code for each window optically readable by the device so that means in the device will advance the strip material a predetermined distance to provide appropriate spacing between graphics along the strip material.

Claims

1. In a device useful for forming graphics such as letters, symbols or pictures along a strip of radiation sensitive material, said device comprising:

means for defining an exposure station;

means adapted for positioning a predetermined portion of a said strip at said exposure station; and

means adapted to be actuated at said exposure station for momentarily irradiating the predetermined portion of a said strip at said exposure station in a sharply defined graphic pattern, including;

a template comprising a thin radiation transparent member with a radiation blocking coating having sharply defined open areas corresponding in shape to graphics to be formed to provide radiation transmissive windows through said template, having a viewing opening adjacent each of said windows, and having for each of said windows a positive image of that window within said viewing opening, which image is positioned with a predetermined relationship with respect to that window;

said template having locating orifices at a predetermined location with respect to each of said windows;

means for mounting said template to register one of the windows at said exposure station comprising locating members adapted to enter said locating orifices;

means mounting said locating members for movement between an exposure position with the window associated with the locating orifices located at said exposure station, and a preview position with the positive image corresponding to the window associated with the locating orifices positioned at the exposure station at the position in which the window is located when the locating members are in their exposure position;

radiation means for briefly irradiating the portion of the strip at said exposure station through the aligned window, comprising a flash lamp;

means mounting said flash lamp for movement between a normal position spaced from said exposure station to afford visible inspection of said template and said radiation sensitive material portion at said exposure station, and an expose position with said lamp closely adjacent the exposure station;

means for operating said flash lamp upon movement of the lamp to its expose position; and

means coupled between said means mounting said lamp for movement and said means for mounting said template for positioning said locating members in said preview position when said lamp is in its normal position, and for positioning said locating member in said exposure position when said lamp is in its expose position;

the improvement wherein;

said locating members are two spaced parallel upwardly projecting pins;

said windows and positive images on said template are in a rectangular array; and

said template has a different pair of locating orifices at a predetermined location with respect to each of said windows, with each pair of locating orifices being adapted to receive said locating members to register the associated window at the exposure station on the device.

2. A device according to claim 1 wherein each pair of said locating orifices comprise a first orifice in which one of said pins is adapted to be received for close fitting engagement on all sides, and a second orifice in which the other of said members is adapted to be received for close fitting engagement on only the two sides of the pin parallel a line joining the centers of said projecting pins.

3. In a device useful for forming a series of graphics such as letters, symbols or pictures along a strip of radiation sensitive material, said device comprising:

means for defining an exposure station;

means adapted for moving a said strip through said station to position a predetermined portion of the strip at said exposure station; and

means adapted to be actuated at said exposure station for momentarily irradiating the portion of the strip at said exposure station in a sharply defined graphic patterns, includin;

a template comprising a thin radiation transparent member with a radiation blocking coating having sharply defined open areas corresponding in shape to graphics to be formed to provide radiation transmissive windows through said template;

means for mounting said template to register any one of the windows at said exposure station;

radiation means for briefly irradiating the portion of the strip at said exposure station through the aligned window, comprising a flash lamp, means mounting said flash lamp for movement between a normal position spaced from said exposure station to afford visible inspection of said template and the portion of the strip at said exposure station, and an expose position with said lamp closely adjacent said exposure station, and

means for operating said flash lamp upon movement of the lamp to its expose position, the improvement wherein;

for each of said windows said template has optically readable code means at a predetermined location with respect to that window for indicating a predetermined spacing to be provided for that window; and

said device includes advancing means for optically reading the code means associated with one of said windows at said exposure station and for operating said means adapted for moving upon movement of said lamp from its normal position to its expose position and back to its normal position to advance said strip past the station a distance indicated by said code means.

4. A device according to claim 3 wherein said optically readable code means comprises a spacing opening in the coating on said template for each of said windows, which spacing opening for each of said windows has a width with a predetermined relationship to the width of that window.

5. A device according to claim 4 wherein said means adapted for moving comprises a pair of parallel nipping rollers adapted to receive said strip therebetween with said rollers in friction driving engagement with the strip and a shaft hving one of said rollers fixed thereon;

said means mounting said flash lamp comprises an arm having said lamp at one end and being mounted for pivotable movement at an end opposite said lamp; and

said advancing means comprises;

a one-way clutch having a first half rotatably mounted on said shaft and a second half, said halves being in driving engagement upon rotation of said second half in a first direction relative to said first half and being released upon rotation of sid second half in a second direction relative to said first half;

a friction clutch coupling said first half of said one-way clutch to said shaft;

linkage means coupled between said second half of said one-way clutch and said arm and having portions relatively movable from a first relative position with said portions in engagement with each other to position said second half at a start position when said arm positions said lamp in its normal position and to permit said arm to move said lamp to its expose position without moving said second half from said start position;

means for directing light through the spacing opening associated with the window at the exposure station;

a light sensor;

means for moving said light sensor across the width of the spacing opening associated with the window at the exposure station when said arm is in its exposure position;

an electric clutch means having parts mechanically coupled between said second half of said one-way clutch and said means for moving said light sensor and being electrically coupled to said light sensor for activation to engage said parts and rotate the second half of said one-way clutch away from said start position in said second direction only when light is sensed by said light sensor, so that said second half of said one-way clutch will be displaced from said start position a distance related to the width of said spacing opening upon movement of said light sensor across the width of said spacing opening and said linkage means will move said second half of said clutch in said first direction to its start position to drive said rollers via said clutches to advance the strip past the station a distance related to the graphic formed upon movement of the arm from its expose position to its normal position.

6. A device according to claim 5 wherein said linkage means further includes an adjustable portion adapted to be moved to a position at which it will stop relative motion of said portions of said linkage means during movement of said arm to move said lamp from its normal to its expose position to move said second half of said one-way clutch in said second direction during such movement and thereby provide an additional amount of movement of said strip material along said path in addition to that provided by said moving means during movement of said arm from its expose position to its normal position.

7. In a template adapted for use on a device for forming graphics on radiation sensitive material by selective exposure through the template at an exposure station, said template comprising a thin radiation transparent member with a radiation blocking coating having sharply defined open areas corresponding in shape to graphics to be formed to provide radiation transmissive windows through the template, said coating having a viewing opening adjacent each of said windows and having a positive image of said window in said viewing opening, which image is positioned at a predetermined position with respect to its corresponding window, the improvement wherein:

said template has locating orifices at a predetermined location with respect to each of said windows, said locating orifices being adapted to receive locating members on a said device to register the window at the exposure station on the device; and

for each of said windows said coating on said template has an optically readable code at a predetermined location with respect to that window, said code providing an indication of the width of said window so that means on the device can optically read the code associated with one of the windows at the exposure station to facilitate spacing of graphics formed via the template.

8. A template according to claim 7 wherein said windows are in a rectangular array.

9. A template according to claim 7 wherein said optically readable code comprises a spacing opening in said radiation blocking coating having a width with a predetermined relationship with respect to the width of said window.