Abstract:
A multiple-source array for use in thermal printing uses source interleaving to avoid overlapping of the dye-transfer tracks upon the donor material in a single pass. The array includes independently addressable printing element data channels and a data distributor allowing interleaving to be accomplished in the printhead. The printhead also includes pixel replication circuitry that allows pixel replication in both the fast and slow scan directions.
Abstract:
An ablated materials collection apparatus for a laser dye ablation printing process includes a set of walls to define a vacuum chamber open towards the platen surface, a vacuum source which communicates with the vacuum chamber through an opening in the walls on the crosstrack side of the vacuum chamber away from areas of the recording element already written and on the intrack side of the vacuum chamber downstream with respect to the direction of scan. A heat source for the vacuum chamber inhibits adherence of ablated material to surfaces of the vacuum chamber, and a solvent application prevents buildup of ablated material on surfaces of the vacuum chamber. An electrostatic air cleaner and a carbon filter clean the discharge air. The wall set defines a semicylindrical end surface which substantially conforms to the cylindrical shape of the platen surface to thereby form a close fit with the platen surface such that the platen surface forms a wall of the vacuum chamber.
Abstract:
A method and apparatus are disclosed for the calibration of a multichannel printer. The printer comprises a plurality of diode lasers which are modulated in accordance with an information signal. Radiation from the diode lasers is imaged onto a receiving medium such as a thermal print medium. The thermal print medium is supported on a drum which is rotatable about an axis. In order to balance the output from the diode lasers, test patterns are formed on the receiving medium with each of the lasers using known power inputs. The density of each of the test patterns is measured, and the density values obtained are correlated with the input power levels for each of the lasers. The measurement of densities produced by a single laser is facilitated by slowing the print head down by a factor of the number of lines normally printed and writing with one line source at a time.
Abstract:
A dual port, dual speed image memory interface is capable of controllably inputting or outputting medium speed serial data through a medium speed port at the same time that high speed serial imagery data is being supplied to or read from a high speed data rate port. Access to the medium speed port is through a mux/demux unit, which is coupled to receive imagery data at the medium data rate and controllably writes successive data signals, in parallel, into respective ones of a set of plural memory units, and controllably reads out data from the parallel-connected memory units and assembles the accessed data in the form of a serial output digital data stream for transmission to a requesting destination device signals at the medium data rate. Access to the high speed port is through a high data rate shift register, which is coupled to receive high speed imagery data and controllably transfers successive pixel signals, in parallel, to the input stage of each internal shift registers that are coupled to respective row access ports of the plurality of parallel-connected memory units. During high speed read out successive rows of memory data are transferred from the internal shift registers into a respective stage of the high data rate shift register, which is then serially clocked for high speed readout.
Abstract:
An image capture and compositing apparatus for a photobooth (10) photographs a customer against a fixed color background (28), extracts the customer from that image and then inserts the extracted customer image into an arbitrary background image in such a manner that there are no noticeable artifacts between the inserted image and the background image and so that it appears that the subject was actually situated in the background scene when photographed. The imagery processing mechanism employed generates a pair of masks, one of which is associated with the foreground image and the other of which is associated with the background image. These masks are used to extract the subject (160) from an image of the subject against a reference color backdrop, to define what portion of the background image is to be blanked out and to controllably blend the border of the inserted subject image with the background image. The photobooth contains a customer lighting system (50,42) located above and behind the position where the customer is seated. A separate backdrop lighting system (32) is located behind the customer and illuminates a blue reference backdrop against which the customer is photographed and which is photographed per se to provide a reference for mask production.
Abstract:
A method of aligning a stamp to a stamp backing plate includes mounting a fixture with a first alignment feature to a platen; providing a first stamp with a second alignment feature which matches the first alignment feature; aligning the first stamp to the fixture using the first and second alignment features; transferring the first stamp from the fixture to a first stamp backing plate maintaining registration; providing a second stamp with a third alignment feature which matches the first alignment feature; aligning the second stamp to the fixture using the first and third alignment features; and transferring the second stamp from the fixture to a second stamp backing plate maintaining registration.
Abstract:
A relief printing member includes at least one solid image feature on the relief printing member; encoded data on at least one solid feature; wherein the encoded data in at least one solid image feature includes a modification of at least one surface of the relief printing member within a boundary of the solid image feature.
Abstract:
In a method and printing apparatus, a receiver is moved in a travel direction relative to a print engine. The print engine has a predetermined profile of smear in the travel direction at a plurality of sites on the receiver. Each site corresponds to a respective one of the pixels. A digital image to be printed with the print engine is received and digitally filtered based on the profile to provide a filtered image. The filtering is localized, non-symmetrical, and at least partially compensatory of the smear. As the receiver is moved, the filtered image is printed on the receiver, the printing being modulated in accordance with the filtered image.
Abstract:
A relief (or flexographic) printing precursor has first and second radiation-sensitive layers, or a plurality of radiation-sensitive layers. The first radiation-sensitive layer is sensitive to a first imaging radiation having a first λmax. The second radiation-sensitive layer is disposed on the first radiation-sensitive layer and is sensitive to a second imaging radiation having a second λmax that differs from the first λmax by at least 25 nm. An infrared radiation ablatable layer can be present and is opaque or insensitive to the first and second imaging radiations and contains an infrared radiation absorbing compound. These relief printing precursors can be used to prepare flexographic printing plates, cylinders, or sleeves where the ablatable layer is used to form an integral mask on the element. Use of the invention provides a relief image without any loss in the strength of the small dots and can be carried out using multiple irradiation steps using the same apparatus.
Abstract:
A method for selecting a best three color solution for a CIE_Lab request comprises generating a three color database (10) of CIE_Lab values at specified colorant input levels. A closest point in the database with colorant input levels is found, which will produce a CIE_Lab value that is closest to the CIE_Lab request. A matrix of points centered on the closest point (30) is selected. A linear model to the matrix of points is found. An output color consisting of a set of colorant levels is created using the linear model.