Abstract: A method for tracing an object such as an outline of a picture or a line image, wherein the object is sensed by a set of sensing elements arranged in an optical head moving along the object, to detect a position and a direction of the object, wherein the optical head is controlled to trace the object depending on the detected position and the direction of the object, and wherein the object is reproduced by reproduction means which is moved in synchronization with the optical head. Present invention improves this method by moving the optical head along portions of the object, which the sensing elements can discriminate hardly or not at all nor follow the object, according to line segment data which is predetermined and represent a plurality of points of coordinates.

Abstract: A contact printer in which, when a spring roller is rolled over a transparent plate on which an original plate and a photosensitive material are laid one on another, a flexible airtight sheet wound round the spring roller is extended to cover the transparent plate. The distance between the transparent plate and the spring roller is gradually reduced as the spring roller is rolled rearwards, so that the distance between the transparent plate and the point of contact of the airtight sheet to its own rolled part wound round the spring roller is maintained substantially to a fixed value, thereby contacting the original plate and the photosensitive material onto the transparent plate tightly. A squeeze roller may be provided for squeezing air from a space between the transparent plate and the airtight sheet by rolling thereon. A lower step on which the spring roller and the squeeze roller may be held when the printer is not used, can be formed in the front top end of a frame body.

Abstract: A method for controlling exposure light beams for use in a picture reproducing machine such as a color scanner and a color facsimile, wherein a light beam is supplied to an acoustooptical deflector and is deflected thereby to obtain diffraction light beams which are incident to fixed light paths and are used for exposing a recording film, and wherein the diffraction light beams are controlled by varying a frequency of a supersonic wave supplied to the acoustooptical deflector so that each diffraction light beam may be or may not be incident to the respective light path.

Abstract: A method and machine for positioning films on base sheets is disclosed. A first film on a base sheet is laid out into a desired position on a base plate, and positions of register marks attached on the first film are detected by photoelectric detectors including photoelectric elements which detect the register marks and output signals whose strengths are varied depending on the positions of the elements with respect to the register marks. Then, a second film on a base sheet is put on the first film so that the register marks on the second film, which are marked in the same positions as those of the first film, may approximately overlap those register marks of the first film, and the register marks of the second film become coincident with those of the first film by moving the second film by means of a drive means according to the output signals from the photoelectric elements, thereby positioning the second film into the desired position.

Abstract: A method for obtaining a composite color picture out of a plurality of original pictures and a camera employing the method are disclosed, wherein a plurality of original color picture are selectively exposed on a sheet of film one by one in a sequential manner with appropriate color compensation, magnification or reduction in size, and proper masking conducted upon each exposure. Both photographic film on which to duplicate composite picture and the original pictures are displaced across and on the optical center line of a camera in such a manner that, on the composite photographic picture thus obtained, the original pictures are laid out according to a plan.

Abstract: A color control simulator for a picture reproducing machine such as a color scanner and a color facsimile, wherein an input means such as a pickup head scans an original picture to obtain color separation picture signals which index a memory table stored in a memory to output first color-corrected color separation picture signals, wherein the first color-corrected color separation picture signals of the table are replaced with second color-corrected color separation picture signals which are output by a color control means such as a color controller and a key board, and wherein a display means displays colors corresponding to the color-corrected color separation picture signals fed from the memory. A computer controls the input means, the memory, the color control means, and the display means.

Abstract: A method for automatically determining the color control conditions such as a highlight point, shadow point, a gradation control, color correction, and so forth, for a picture reproduction for use in a picture reproducing machine such as a color scanner and a color facsimile, wherein an original picture is scanned photoelectrically to pick up color separation picture signal data of the primary colors. The signal data is classified into groups to obtain a distribution condition, and according to the distribution condition obtained the color control conditions are determined.

Abstract: A method for pre-processing a picture signal prior to an operational circuit of a picture reproducing machine such as a color scanner and a color facsimile, wherein an original picture is scanned photoelectrically to obtain the picture signal, wherein first conversion characteristics data stored in a memory are read out by addressing addresses of the memory by the picture signal, and then are changed by second conversion characteristics data depending on a desired reproducible density range of the original picture.

Abstract: A digital masking operation method and machine used in a color control system of a picture reproducing machine such as a color scanner, a color facsimile, or the like, wherein n sets of memory tables are indexed by means of color separation data of primary colors, and wherein data from each memory table is utilized to output a partial sum of predetermined relation to the input according to a conversion table stored therein and then the output data of the primary colors are added for each of the primary colors, in an adder thereby obtaining masking data for each of the primary colors.

Abstract: A correction circuit of a halftone dot area rate detector wherein a relation between a detected halftone dot area rate and a light transmittance or reflectance of an object obtained by a halftone photography is approximately expressed by a turning curve having at least one turning point, which comprises line segments, by using a turning point correction circuit comprising an inverting amplifying circuit, wherein another inverting amplifying circuit is coupled in parallel with the turning point correction circuit, and wherein a potensiometer couples the outputs of the two circuits and outputs a signal corresponding to a correction amount.

Abstract: An automatic knitting needle selection device in which a plurality of selectors are provided with protrusions which are normally in contact with corresponding solenoids that are mounted on a swing plate. The selectors are pivotally connected to a pivot shaft at their lower ends and the tilting motion of the swing plate puts the selectors corresponding to energized solenoids out of action while the remaining selectors are pushed upward by another drive means to set the corresponding knitting needles to a knitting position.

Abstract: A method for controlling writing timings of picture signals to be stored in a memory, for use in a picture reproducing machine wherein the picture signals picked up by picture scanning means are stored in the memory and then the picture signals are read out of the memory, and wherein reproduction pictures are recorded on a recording film by a reproduction recording means by using the picture signals read out. The picture signals are latched consecutively into latch circuits arranged before the memory by a first clock pulse generated by the picture scanning means, and then the picture signals read out of the latch circuits in the latching order by a second clock pulse generated by the reproduction recording means are written into the memory.

Abstract: The method allows the isolation of a certain portion of an original color picture having a color which corresponds to a reference color in a photoelectrical picture reproducing process. The colors of the original picture as well as the reference color are identified by using a color plane which is divided up into incremental areas. Since the computation process is simplified, the color isolation process can be accomplished at the same time as the original picture is photoelectrically scanned.

Abstract: In the film cutter of this invention, a cutter carriage is guided by a guide rod of a circular cross section allowing it to make both a translational motion along the guide rod and a tilting motion about the guide rod, whereby a rotary blade mounted on the cutter carriage is assured of a close contact with a fixed linear blade irrespective of the thickness of the film to be cut for always attaining a satisfactory cutting action. And a film holder working in synchronism with the cutter carriage allows a roll of film to be cut into specified lengths in a sequential manner.

Abstract: A positioning machine of original films on a base sheet, wherein a base sheet having a pair of first register pin holes and pairs of second register pin holes is placed on a base plate which is provided with a pair of first register pins and pairs of second register pins corresponding to the first and the second register pin holes, by fitting the first register pins into the first register pin holes, and then the original films, each having a pair of second register pin holes, is positioned on the base sheet by fitting the second register pins into the second register pin holes of the base sheet and the original films.

Abstract: A color correction apparatus for a duplicate camera wherein three color correction filters of three primary colors are provided and are selectively interposed into the exposure light path, is disclosed. An arithmetic unit is connected to a color correction value setup means which sets up color correction values of colors to be removed from an original picture, and it receives these density values as negative values and subtracts the minimum value thereof from each of the other density values to outputs a color correction signal. Then, a control unit connected to the arithmetic unit controls the color correction filters so that they may be interposed into the exposure light path according to the color correction signal.

Abstract: A method for setting up density values of highlight and shadow points of original pictures to a picture reproducing machine such as a color scanner and a color facsimile, wherein one of the original pictures now being scanned is discriminated to output a discrimination signal, and wherein the highlight and the shadow point density values or values corresponding to a density range of the one original picture are read out of a memory in which the highlight and the shadow point density values or the values corresponding to the density ranges of the original pictures are stored, by addressing the memory by means of the discrimination signal, and then are set up to the picture reproducing machine.

Abstract: A method is disclosed of positioning an object photoelectrically, wherein two photoelectric detectors are placed contiguously, and then the object is moved over the detectors between them and light which is falling on them, said object being formed with a register mark on it which is of different translucency from the object, so that its passing affects the photoelectric detectors. The object is moved in a direction along a line, and when the ratio between the amounts of the register mark which cover each of the detectors (which is measured by measuring the outputs of the detectors) reaches a certain predetermined value, this movement is stopped. Several systems are also disclosed for positioning an object on a plane by using several such setups in different arrangements.

Abstract: A method for stabilizing the intensity of a light beam emitted by a light source and deflected by an acoustooptical deflector element which is controlled by a control signal and is arranged in a scanning exposure head, without regard to deflection angles, wherein a detected light beam intensity is compared with a predetermined reference light intensity. The difference between the light beam intensity and the reference light intensity is detected, and wherein the control signal corresponding to the detected difference is controlled by a stored correction signal which is read out of a memory, so that the intensity of the light beam through the acoustooptical deflector element may be maintained at a certain level.

Abstract: A method for scanning an original picture at a high speed by using a white light for use in a picture reproducing machine such as a color scanner and a color facsimile, wherein a light beam generated by a light source is deflected by a light deflector and the deflected light beam is focused by a concave mirror, and wherein an original picture is scanned by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curve along which the light spot is focused, and then the light beam passing through the original picture is detected by a light detector to obtain a picture signal.