Abstract:
A color electrographic recording apparatus (10) produces on a record medium (16) a composite color image comprising a plurality of superimposed component images of different colors, e.g., magenta, cyan, yellow and black. The medium is driven in opposite directions through the apparatus which has a recording head (48) for forming a latent image on the medium, a plurality of developing stations (26, 28, 30, 32) adjacent one side or both sides of the recording station each of the developing stations developing a latent image into a visible image of a respective color. The apparatus passes a section of the record medium past the recording head to form a first latent image which is developed in its respective color before the medium is reversed past the recording head to permit formation of the next latent image followed by its respective color development. This process is repeated until all component latent images and their respective color development have been completed to form a composite color image. The apparatus also includes registration means to compensate for any dimensional changes of the medium section in use so that all the component color images will be superimposed on one another despite any shrinkage or expansion of the medium during processing.
Abstract:
In an electronic image printing apparatus of the type in which a light sensitive image recording layer (53) is exposed by a light beam (60,60',60''), an apparatus (57,92,154) is provided for determining and controlling the position of the light beam (60,60',60'') which comprises one or two alternating pluralities of diffraction grating patterns (4,6,8;18,20,22) disposed in a corresponding relationship with at least a portion of the light sensitive image recording layer (53) to produce a diffraction grid (52) which when irradiated by the light beam (60,60',60'') provides a diffracted beam which is representative of the position of the light beam on the diffraction grid (52). The position of the diffracted beam is detected to provide the requisite signal for controlling the position of the light beam (60,60',60'').
Abstract:
Precise positioning of image data on an imaging belt (30) in the electrostatographic printing process is accomplished using a positioning means. Lateral position of the imaging belt (30) is detected using a light source (40) and photodetector (44,72,130,208,226) determine an imaging belt edge position and tying the transfer of image data to that position. Circumferential position of the imaging belt is detected using one or more transparent windows which pass over the photodetector (44,72,130,208,226) which, in turn, is illuminated by the light source (40) when a window passes it. The signal from the detector is used to calculate a circumferential adjustment and either the light source or imaging belt motion is adjusted accordingly. Nonoptical embodiments using magnetic or capacitive detectors also can be used to detect the imaging belt circumferential position. A method for positioning image data on an imaging belt is also disclosed.
Abstract:
There is disclosed an electronic printing apparatus which prints images on successive individual film units held in a cassette. Included in the apparatus is a carriage assembly which mounts the cassette for reciprocating movement along a given path. There is provided a carriage driving mechanism which drives the carriage assembly at different directions and speeds.
Abstract:
An image forming device, such as an LED printer, liquid crystal printer, laser printer or the like, comprises a sheet feeding unit (2), a sheet carrier (22), a pulse motor (12) provided for the sheet carrier (22) and driven to carry a sheet (10) fed from the sheet feeding unit (20) to a printer (16) for printing an image over at least one entire line of a sheet (10), and which is perpendicular to the direction in which the sheet is carried, by one printing operation thereof, a motor controller (14) for controlling the stepping motion of the pulse motor (12) for moving the sheet (10), a printing controller (18) for controlling the printing operation of the printer (16) in such a way that each printing operation thereof is synchronized with the stepping motion of the pulse motor (12), and an outlet tray (24) for receiving the printed sheet (10). Such a device can be of smaller size, and can be cheaper to produce, than previously-proposed devices.
Abstract:
A novel closed loop direct position feedback control method and recording apparatus for producing on a recording medium a plurality of successive print lines or otherwise component images. An appendant demarcation device provide for the proper abutting and spacing of each independent print character to prevent or minimize any perceived "banding" in the printed image. The apparatus includes a device for transporting the medium along a path orthogonal to the print head, a recording station in the path and having a translating head for inking, pring, or otherwise suitable device, for producing single lines or swaths of print in conjunction with the indexed advance of the medium relative to the print head. The transport device is operative to advance a first print line or swath through the recording station to form a first print line, to identify and store the position coordinates of each print line or swath, and to advance the recording medium for successive line or swath printing. The direct position feedback control apparatus also includes demarcation sensing and printing device for relative positioning, whereby the distance between the location of any sensed or printed demarcation reference and the next successive print line is controlled such that each print line will neglect the positioning error in any previous print line or swath.
Abstract:
Apparatus for reading out individual x-ray images recorded on a double-emulsion radiographic film or on separate films that were coincident when exposed simultaneously to a polyenergetic or broad x-ray photon energy spectrum beam emergent from a body and where an image corresponding to one obtained with a low energy part of the spectrum is formed on one film and an Image corresponding to a higher energy part of the spectrum is formed on the other. One readout apparatus ia for the case of two separate films which, after development, are illuminated from the back and optically scanned to derive analog signals representative of the intensities of spatially corresponding picture elements on each film. Another apparatus is for the case where the two images are on opposite sides of a film and are represented by alternate fine image information lines obtained by interposing a grid during the x-ray exposure. Another is for the case where a reflective layer is disposed between the film images during readout. In all cases the films are optically scanned and the resulting analog signals are digitized and variously processed to yield an image representative of that which is different between the two original different energy images.
Abstract:
A longitudinally displacable roll apparatus supporting a web (16) of record material is designed to maintain the roll (18) in proper alignment with associated processing equipment as the web is paid from, or wound onto, the roll. The apparatus comprises a pair of frame members supporting the roll. The roll is rotated by a drive shaft (195) having an interengageable coupler on the drive shaft and one end of the roll, to permit the roll to be rotatably driven by the roll drive shaft while not being directly secured thereto. The other end of the roll is engaged by means for displacing it longitudinally in accordance with signals derived from the actual path of the web so as to keep the web accurately on its intended path. The longitudinal and rotational drive system are able to operate independently of each other.
Abstract:
A color electrographic recording apparatus (10) produces on a record medium (16) a composite color image comprising a plurality of superimposed component images of different colors, e.g., magenta, cyan, yellow and black. The medium is driven in opposite directions through the apparatus which has a recording head (48) for forming a latent image on the medium, a plurality of developing stations (26, 28, 30, 32) adjacent one side or both sides of the recording station each of the developing stations developing a latent image into a visible image of a respective color. The apparatus passes a section of the record medium past the recording head to form a first latent image which is developed in its respective color before the medium is reversed past the recording head to permit formation of the next latent image followed by its respective color development. This process is repeated until all component latent images and their respective color development have been completed to form a composite color image. The apparatus also includes registration means to compensate for any dimensional changes of the medium section in use so that all the component color images will be superimposed on one another despite any shrinkage or expansion of the medium during processing.
Abstract:
A picture information input apparatus has a leading and trailing end detecting circuit (42) for detecting the leading and trailing ends of a document to produce read out signals of "1" and "0". The leading and trailing end detecting circuit (42) starts a first count by a document presence detecting signal of "0" from a detecting unit (54) which detects the transfer of the document. When a hole of the document is smaller than an allowable hole diameter, it clears the counting. Only when the hole is larger than the allowable hole diameter, it starts a second count. After the second count ends, it produces a read out signal of "0" indicating that the trailing edge of the document is detected. A picture bus control circuit (44) receives the read out signal of "1" to transmit a picture data signal to a picture transceiver (48), and receives the read out signal of "0" to stop the transmission of the picture data signal.