Abstract: A rectangular pattern recognition device is disclosed which operates to recognize and note the position of solid-line rectangles drawn on an input form, document, or the like. The apparatus first recognizes vertical and horizontal line segments and then discriminates the areas which lie within the joined segments. The device may further be provided with code or symbol recognition means which can discriminate symbols, e.g. an optional numbering of the rectangles from the other line segments forming the rectangles.

Abstract: An input and/or output unit which reads or records a picture utilizing a scanning beam in which sampling positions of picture elements in a main scanning direction are uniformly spaced. A first clock signal is produced which is at least three times as high in frequency as an output sampling clock signal. The first clock signal operates a counter, the output of which is compared with the output of a ROM. The ROM is addressed by a counter which is incremented by output comparison pulses. The output of the comparator is also utilized as the output sampling signal. Numerical values are stored in the ROM such that the output pulses from the comparator occur at times corresponding to constant sampling intervals of the scanning beam along a scanning line.

Abstract: A light pen is provided with an elongated or spatula-shaped light receiving end which houses a plurality of optical fiber tubes in either a linear or two-dimensional array. The device is useful for simultaneously reading the coordinates of a plurality of points within a single scan period of a CRT image produced using the NTSC system. A slideable light interceptor may be provided in the operator of the light pen so as to limit the size or the proportion of the array receiving incident light.

Abstract: An image signal processing device uses an automatically varied threshold value calculated from the average density and the density distribution of an original (document, etc). The threshold value is periodically updated at predetermined intervals, so that the overall image may be reproduced with high fidelity.

Abstract: An apparatus for producing a contour line pattern image from an original image such as a character or the like recorded in binary format in a memory couples image element points equidistantly isolated from edges of the original image and thereby forms a contour line pattern curve. The coupling of the equidistant points and the formation of the contour line pattern curve in the contour line pattern image are repeatedly carried out. Smudged areas of the contour line pattern image are detected and eliminated and missing portions of the contour line pattern image are regenerated.

Abstract: The image converting system including an image input step or apparatus for converting an original document information into electric image signals an inputting them, an image processing step or apparatus for processing the original document information supplied by the image input step in a predetermined process or order to provide converted image signals different from the original image, and a recording step or apparatus for recording the image on a recording medium in accordance with the image signals derived from the image processing step thereby recording a pattern materially different from the original image on the recording medium or displaying same on an indicator. The converted image signals may be obtained by the use of a coding or scrambling signal and an Exclusive OR operation. Line shifting may be employed. The original image may also be divided into a number of grid components and mixed in accordance with the coding rule.

Abstract: A character shaping device includes a tablet or the like upon which characters are written or drawn, and a device for determing distribution functions for the character as projected in the x- and y-directions. From this information the "center of gravity" of the character is calculated, and the x- and y-dimensions of the character are detected to determine the character area. The image is then centered within a normalization area and enlarged or reduced in size according to scale factors dependent upon the relative dimensions of the character area and the normalization area, to obtain a well balanced and sized character which may then be printed along with other characters to form sentences on a printed document or the like.

Abstract: A multilevel image printing device in which a laser beam is scanned onto the surface of a photoconductive drum with plural intensity levels without the use of a modulator. A multilevel image outputting circuit produces a multilevel signal which is applied to a multilevel image signal to laser beam conversion circuit which converts it into an intensity value for operating a semiconductor laser beam source. The multilevel image signal to laser beam conversion circuit includes plural switches which are operated in response to the multilevel image signal coupled through resistors of different values which determine the voltage applied to the semiconductor laser beam source.

Abstract: An oblique projection original is formed by deforming an orthogonal projection original in such a manner that a rectangular original is transformed into a trapezoidal original by compressing the orthogonal projection original by thinning scanning lines in a horizontal direction. In addition, predetermined bits in each scanning line are thinned in a vertical direction, and each line is compressed by reducing first and last portions of each line by half the number of bits thus thinned. Finally, white bits are inserted at the first and last portions of each scanning line to complete each scanning line.

Abstract: Apparatus for producing and reproducing embedded patterns in which a character or the like including a pattern which is not observable macroscopically can be differentiated from the other formats microscopically. An input unit reads a normal original image pattern utilizing a raster scanning system. In the apparatus for producing the format, a processing unit includes a gate which receives a signal from the input means and passes or blocks the signal in accordance with the desired embedded pattern. An output unit records the image using the raster scanning system. In the apparatus for reproducing the format, a processing unit includes a gate which blocks or passes an input signal depending on whether or not it contains the embedded pattern.

Abstract: A picture printing device and method for printing pictures using a main scan and a sub scan. A first comparison means counts the number of picture elements in a main-scanning direction and compares that number with a first value preset in the first comparison means. A second comparison means counts the number of scanning lines in a sub-scanning direction and compares that number with a second value preset in the second comparison means. A printer records predetermined signals in response to combinations of the outputs of the first and second comparison means.

Abstract: A metal periphery type oil seal having a metallic reinforcement ring of a substantially L-shaped section. The ring is provided with an outer peripheral portion adapted to be fitted into a stationary portion and an annular side portion having its inner end in sliding contact with a rotary shaft. The outer peripheral portion is inwardly curved at its free end and the annular side portion is also bent at its inner end to improve the rigidity of the ring. A rubber lip is secured by baking to the annular side portion of the ring so as to clamp the inner peripheral end thereof. The rubber lip is integrally formed with an annular rubber plate which is secured by baking to the outer surface of the annular side portion. The outer peripheral portion and the annular side portion of the ring are connected with each other through a two-stepped bent portion with an annular cavity formed on the outer surface thereof.

Abstract: An image transcribing system for transferring an image from an original document to a recording sheet in which the original image is scanned, converted to binary signals and stored in a first page memory. An image processing section transfers the image data from the first page memory to a second page memory while it is simultaneously enlarged by a predetermined factor. In the enlargement process, the image data is first enlarged by an integer factor then reduced by a fractional factor in accordance with stored bit patterns corresponding to the required fractional factor.

Abstract: Method and apparatus for eliminating noise in a digitally recorded visual image wherein the proportion of picture elements in an area surrounding an objective area having a first visual level or component is determined and the objective area concluded as having the same visual level or component when the proportion is above a predetermined value. In one embodiment, both picture elements in the surrounding and objective areas are counted to determine the proportion while in another only those picture elements in the surrounding area are counted.

Abstract: A sealing device for pistons comprises a piston-ring groove having upper and lower annular inclined surfaces forming a nearly V-shape in cross-section, a piston ring having an annular inclined surface that bears tightly against the lower annular inclined surface of the piston-ring groove, and an auxiliary ring having an annular inclined surface that slides downwardly along the upper and annular inclined surface of the piston-ring groove to force the piston ring downwardly along the lower annular inclined surface of the piston-ring groove and expand the piston ring.

Abstract: A novel sealing device of extremely simple and durable construction particularly adapted for use in sealing between the opposed flat end surfaces of two mutually movable members, for example, one for a rotary member and the other for a stationary member. The device includes a seal ring of novel construction having a flat sealing face and a tapered, conical sealing face formed on the opposite sides thereof, and an annular groove formed in said rotary member for receiving said seal ring, said groove being provided with a conical bottom surface. The seal ring is cut to provide itself with a radial expanding force.

Abstract: A sealing device especially designed for sealing between the opposed flat surfaces of a stationary member and a rotary member. The device comprises a multiple seal ring composed of a plurality of annular seal elements of different diameter which are received in an annular groove formed in the rotary member. The seal elements each have a flat sealing face formed at one end for sealing contact with said flat surface of said stationary member and a conical sealing face formed at the other end for sealing contact with a conical bottom surface of the groove, the conical sealing face diverging in a radially outward direction toward the flat sealing face. The seal elements are each cut radially so as to provide themselves with a radially outwardly expanding force and closely fitted one over the other in a concentric relation with the radial cut portions of the respective seal elements being circumferentially displaced from one another for sealing the cut portions of the seal elements.

Abstract: A seal ring with tapered surfaces is constituted by an inner ring, outer ring and a tightening resilient member. Each of the inner and outer rings is provided with an inner and outer peripheral surfaces and a pair of sealing end surfaces extending between the inner and outer peripheral surfaces. Each of the inner and outer ring is divided in the circumferential direction into two sections. The inner peripheral surface of the outer ring fits the outer peripheral surface of the inner ring, while the outer peripheral surface of the outer ring is surrounded by the resilient member so that the inner and outer rings are resiliently pressed radially inwardly. The end surfaces of the inner and outer rings are arranged flush to form common sealing surfaces. At least one of the common sealing surfaces thus formed constitutes a conical surface so that the axial distance between two common sealing surfaces is varied such that it increases toward the radially outer side.

Abstract: A sealing element is provided which is formed of a fluorocarbon resin sheet and radially slit into two annular overlapping flaps to receive a garter spring or the like therebetween at a location adjacent to that peripheral portion of the element which is left solid and formed with a sealing edge. Despite of the limited elasticity of the seal material per se, the sealing element, finally molded into shape, has an exceedingly high ability to follow the mating surface of a rotating shaft or other member of a mechanical assembly to be sealed. The followability of the sealing element is further improved on account of the slit formation of the element.

Abstract: A method for molding a cover on a metal core by preforming cover segments and molding the latter to size with the core interposed therebetween. When molded, the preformed segments are gradually deformed and uniformly compacted to a high density particularly in regions in direct contact with the wall surfaces of the mold, with no inclusion of cracks, pinholes or other structural defects therein. The product molded in this manner exhibits a very high corrosion-resisting characteristic with no machining operation conventionally required thereon, particularly when molded of tetrafluoroethylene resin powder.