Patents Assigned to Graphic Arts Technical Foundation
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Patent number: 6171734Abstract: A paper substrate is laminated with a metalized layer forming a mirrored surface. A partially transparent black diffraction grating is applied by stochastic screening to the mirrored surface. The diffraction grating forms a random pattern from selected geometric shapes. Information, such as alphanumeric indicia or graphics, is printed on the stochastic screen to thus form a reflective diffraction device which is printable in a conventional manner while inhibiting reproduction of the printed information by conventional techniques, including black and white and color photo-reproduction and facsimile machines. The partially transparent black stochastic screen forms a diffraction grating on the metalized layer so that when illuminated from the light source of either a specular or diffuse illumination-type photocopier, random interference patterns of light occur at the interface of the metalized surface and the stochastic screen.Type: GrantFiled: November 2, 1998Date of Patent: January 9, 2001Assignee: Graphic Arts Technical FoundationInventors: Richard D. Warner, John T. Lind
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Patent number: 6069601Abstract: A display for soft proofing an image to be reproduced using a set of selected printing colors includes a plurality of display elements each for displaying a color substantially spectrally matched to one of a set of printing colors.Type: GrantFiled: October 15, 1997Date of Patent: May 30, 2000Assignees: R.R. Donnelley & Sons Company, Graphic Arts Technical FoundationInventors: John T. Lind, Donald N. Reeves, Richard D. Warner
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Patent number: 5830609Abstract: A paper substrate is laminated with a metalized layer forming a mirrored surface. A partially transparent black diffraction grating is applied by stochastic screening to the mirrored surface. The diffraction grating forms a frequency modulated pattern from selected geometric shapes. Information, such as alphanumeric indicia or graphics, is printed on the stochastic screen to thus form a reflective diffraction device which is printable in a conventional manner while inhibiting reproduction of the printed information by conventional techniques, including black and white and color photo-reproduction and facsimile machines. The partially transparent black stochastic screen forms a diffraction grating on the metalized layer so that when illuminated from the light source of either a specular or diffuse illumination-type photocopier, random interference patterns of light occur at the interface of the metalized surface and the stochastic screen.Type: GrantFiled: May 10, 1996Date of Patent: November 3, 1998Assignee: Graphic Arts Technical FoundationInventors: Richard D. Warner, John T. Lind
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Patent number: 5542352Abstract: A shop towel is wrapped around a retainer having a base with a ratchet bar extending upwardly from one surface of the retainer base. The ratchet bar extends into a recess of a handle of a body portion having a contoured surface for receiving at one end the retainer and at the opposite end the hand of an operator. The ratchet bar is advanced into engagement with a spring actuated-pawl that extends transversely through the handle body portion. The pawl is axially movable in the handle and maintained by a spring in engagement with the ratchet bar. The ratchet bar is freely advanced into the recess and engaged by the pawl to maintain the retainer movably connected to the handle body portion. The engagement of the pawl with the ratchet bar prevents the retainer from being inadvertently disconnected from the handle until the pawl is pulled by a lever out of contact with the ratchet bar.Type: GrantFiled: October 28, 1994Date of Patent: August 6, 1996Assignee: Graphic Arts Technical FoundationInventors: Daniel S. Blackman, Richard D. Warner, Lloyd P. DeJidas, Gary A. Jones
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Patent number: 5311246Abstract: A control area is imaged on photo-sensitive graphic arts material to be evaluated for the sharpness of images printed on the material through the various stages of the reproduction process. The control area includes a light transmitting image divided into a plurality of segments where the image is a sharp-edged line element of a fixed preselected width. The line element is repeated from segment to segment in a preselected pattern of line elements separated a preselected distance apart by a space. The first segment of a control area has a solid optical density. At the opposite end of the control area is positioned a second segment having a substrate optical density. An intermediate segment includes a plurality of sections in which the line elements in each section are spaced apart the same distance, and the spacing between line elements varies from one section to the next. Thus, a range of spatial frequencies of repeating line elements is provided in the control area.Type: GrantFiled: August 26, 1992Date of Patent: May 10, 1994Assignee: Graphic Arts Technical FoundationInventors: Richard D. Warner, Anthony P. Stanton
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Patent number: 4527333Abstract: A device for indicating a quantitative change in dot area of an image in a printing process and the method of making the same. The apparatus includes a square matrix array on a substrate. Four square members are provided in the matrix array on the substrate. The square members are each equal in size and have certain of their corners in juxtaposition with certain corners from other square members to form a square center opening bounded by a side from each square member. The device also includes five circular shaped members, provided in the matrix array on the substrate. The circular members are each equal in size.Type: GrantFiled: January 23, 1984Date of Patent: July 9, 1985Assignee: Graphic Arts Technical FoundationInventor: Richard D. Warner
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Patent number: 4278467Abstract: A fountain solution for use with a lithographic offset printing press is prepared by admixing fountain etch constituents, water and between about 0.5 and 5 percent by volume of a substitutive additive for isopropyl alcohol. The additive or replacement may be a Carbitol or Cellosolve derivative or mixtures of Cellosolve or Carbitol derivatives, such as phenyl glycol ethers or other organic non-ionic compounds, as for example, n-hexoxyglycol (n-hexyl Cellosolve), n-hexoxydiethylene glycol, (n-hexyl Carbitol), 2-ethyl-1,3-hexanediol, n-butoxyethylene glycolacetate, n-butoxy-diethyleneglycolacetate, and 3-butoxy-2 propanol. The fountain solution free is isopropyl alcohol does not have the adverse toxic and flammable properties of prior art fountain solutions containing isopropyl alcohol.Type: GrantFiled: October 22, 1979Date of Patent: July 14, 1981Assignee: Graphic Arts Technical FoundationInventor: Thomas A. Fadner