Abstract: In order to improve machinability of a sintered compact, a phosphate compound of an alkali earth metal (calcium phosphate compound or the like) is mixed with an iron-based powder, or an alkali earth metal fluoride (calcium fluoride, or the like) is further mixed with the iron-based powder. Alternatively, the alkali earth metal fluoride, together with a graphite powder, is preferably fixed to recesses of the iron-based powder.

Abstract: In order to improve machinability of a sintered compact, a phosphate compound of an alkali earth metal (calcium phosphate compound or the like) is mixed with an iron-based powder, or an alkali earth metal fluoride (calcium fluoride, or the like) is further mixed with the iron-based powder. Alternatively, the alkali earth metal fluoride, together with a graphite powder, is preferably fixed to recesses of the iron-based powder.

Abstract: A method and apparatus for processing images of a document containing characters, tables and figures. After the documents are scanned, the various areas including the character images, table images, and figure images are grouped in accordance with the type of image. Different file names are assigned to each of the character section, table section, and figures. A portion of the file names for each of the character images, table images, and figures may be the same in order to indicate that the characters, tables, and images belong to the same document. Extensions may be assigned to the file names indicating whether the file contains characters, tables, or figures. Further, a number may be stored to indicate the table number, figure number or character image number. If newspaper or magazine articles are scanned, the various sections of the articles may be arranged automatically in order to make the information easier to utilize and to have an efficient use of the paper.

Abstract: In a digital copier, a trim mode may be entered on an operating section and a particular area of a document may be marked on a marking device. As an image scanner reads the document image, the resulting image data are written to a memory unit. A data separating section separates characters lying in the marked area of the document, and then a contour separating section separates the contours of the characters. An approximating section determines whether a continuous contour line is straight or curved on the basis of the angle and length thereof and then approximates contour data to a straight line or a curve. As a result, characters are trimmed and processed such that straight lines appear sharp while curves appear smooth. A drawing section writes the approximated contour data in a memory unit and paints the inside of the contour data to thereby draw an output image in the memory unit.

Abstract: An image forming apparatus including an operating board for indicating operating modes, a document reading member and an outputting member for outputting data. An image compressing member compresses image data read by the document reading member and a memory member records the compressed image data, wherein the outputting member produces an output image on a paper sheet based on the compressed image data recorded in the memory member. An image extracting member extracts the compressed data from image data which are obtained by reading the output image by the image reading member and a decompressing member decompresses the compressed image data which are extracted by the image extracting member, wherein the outputting member produces an output image on a paper sheet based on the decompressed image data. With input image data being preserved, the image data are compressed by an image compressing part are thus converted into a cryptograph.

Abstract: An image processing device incorporated in a digital image forming apparatus and capable of effecting various kinds of digital image processing, e.g., erasing, italicizing and shadowing, and blanking with a particular area of an image. Considering the fact that frame lines included in a document image can replace marks to be entered by a marker pen, the image processing device extracts areas each being delimited by a frame line as candidates for image processing.

Abstract: An image processing apparatus for deleting an undesired image from an image includes a scanning part, an image memory for storing an image of a document being scanned, a delete-image memory for storing predetermined standard geometry parameters with respect to a delete image, the standard geometry parameters defining a predetermined configuration of the delete image, a candidate fetching part for fetching a candidate image from the stored image of the document based on the standard geometry parameters, a candidate rotating part for rotating the candidate image, a discrimination part for detecting whether or not the candidate image is a delete image by comparing a configuration of the rotated candidate image with the predetermined configuration of the delete image, a deletion part for deleting the detected candidate image from the stored image of the document if it is detected that the candidate image is a delete image, and an output part for outputting the stored image in the image memory from which the detec

Abstract: An image forming apparatus has an image reading and correcting device capable of reading a document including a table, identifying the table (guideline) from the document correcting the table, and then outputting an image with the corrected table. The apparatus can form corrected images in a table included in a document image, change the magnification ratio of the corrected table to the proper size and select the proper paper size for output.

Abstract: A security system, including a cable having a groove formed in the inside thereof to accommodate therein an optical fiber with an excessive length, a plurality of supports having mandrels to support the optical cable so as to provide a fence, a light transmitter to inject light into one end of the optical cable and a light receiver to detect the light projecting out of the other end of the optical cable so that any transmission loss through the optical cable due to an intrusion of the fence may be measured. The cable is formed so that when tension is applied to the optical cable, a transmission loss is detected. The resulting system has a threshold capability which distinguishes valid from false intrusions.

Abstract: A debinding method for use in a process for producing a sintered object, by effecting a debinding pre-treatment by heating the injection-molded object in an atmosphere of reduced pressure at a temperature at which the vapor pressure of the component of the organic binder having the highest vapor pressure does not exceed the pressure of the atmosphere, thereby removing the organic binder in the amount of at least about 18 wt %; and effecting a further debinding heat treatment in which the injection-molded object is heated to and maintained at a temperature higher than the temperature in the debinding pre-treatment.

Abstract: An apparatus for transforming a line image, in the form of a two-level digital image, into contour vectors, and forming a center line for the image. First, the contour (or contours) of the image are traced and corrected, after which the center line of the image is determined based on the contour vectors that define opposite sides of the line image. In the contour correction process, composite line images having both "unitary" (open) figures such as in FIG. 7A, and closed-loop figures (such as in FIG. 7B) are decomposed into separably distinguishable unitary figures and closed-loop figures. This decomposition facilitates determination of the center line of the contour vectors, while reducing memory usage and not compromising processing speed as compared with known systems.

Abstract: The present invention relates to a method and apparatus to determine whether a user is authorized to utilize a data communication network, and more particularly a terminal machine in the network. Data having a predetermined number of bits are read out from a relatively large random number memory, containing previously stored data, by using key data to address said bits at the terminal machine. The addressed data are used as new key data and data each having a predetermined number of bits are repeatedly read from the data in the random number memory to form identification data on the basis of the old and new key data in each cycle. In such manner, there are formed identification data unequivocally determined in accordance with the key data and having high security or confidentiality.

Abstract: An image forming apparatus capable of reproducing a hand-written document by automatically correcting it. The apparatus discriminates figure images including hand-written rules and character images which are carried on a document. Thereafter, the apparatus corrects, among the figure images, straight lines images in a designated direction while preserving their relationship to the other figure images as to connection. Further, the apparatus changes the distance between nearby straight line image such that all the straight line images are spaces apart by the same distance.

Abstract: A digital image forming apparatus which includes an image reading part for optically reading an original and photoelectrically converting an input image signal into a two-level image data carrying character images and graphic images, a first storage part for storing the two-level image data, a second storage part for storing an output image data to be outputted, a character cutting part for taking out individually the character images from the two-level image data to define a size of each of the character images and an array of black pixels within the character images, a character line extraction part for extracting a character line data from the second data based on the size of each of the character images and the array of black pixels within the character images, a character alignment part for correcting the character images to have the same size and the same distance therebetween and aligning the set of lines of characters along the character alignment direction so that the corrected character images and t

Abstract: It is provided a method for the manufacture of a corrosion-resistant sintered alloy steel, which comprises providing a stainless steel powder; adding a binder to said steel powder; molding the mixture; and carrying out the steps of (1) heating the resultant molding to remove the binder therefrom, (2) sintering the thus debound molding under reduced pressure up to 30 Torr, and (3) further sintering at a higher temperature than those of steps (1) and (2) in a non-oxidative atmosphere under substantially atmospheric pressure. It is also provided a corrosion-resistant sintered alloy steel which comprises a stainless steel, said alloy steel having a density ratio of not less than 92%, a maximum diametric of pore present in the structure of not larger than 20 .mu.m, and a content of Cr at the surface of the steel as being sintered which is not less than 80% of a content of Cr in the inside thereof.

Abstract: A process is provided for the production of a sintered body. The process includes the following consecutive steps: i) mixing and kneading one or more metal powders and/or one or more alloy powder with a binder into a compound, said metal and alloy powders having an average particle size not greater than 30 .mu.m, ii) injection-molding the compound into a green body; iii) debinding the green body to form a debound body; and iv) subjecting the debound body to a first-stage sintering at 1,050.degree.-1,250.degree. C. in a reduced-pressure atmosphere and then to second-stage sintering at a temperature in a range of 1,100.degree.-400.degree. C. which is higher than that of the first-stage sintering. This process can provide sintered Ti bodies and sintered magnetic bodies of the Fe-Si type, which have a density ratio of at least 95%.

Abstract: An image generating apparatus having a character recognizing function and a graphic function. Recognizing means recognizes contents of a document, while arithmetic operating means performs arithmetic operations with the recognized information. Graph formating means produces image data for graphing the results of arithmetic operations and delivers them to printing means, whereby the contents of the document are outputted in the form of a graph. A categorzied total table representative of the recognized information is outputted together with the graph. The results of recognition by the recognizing means are correctable. The recognized information from the recognizing means is optically indicated on a display.

Abstract: A process is provided for the production of a sintered body. The process includes the following consecutive steps: (i) mixing and kneading one or more metal powders and/or one or more alloy powder with a binder into a compound, said metal and alloy powders having an average particle size not greater than 30 .mu.m, (ii) injection-molding the compound into a green body; (iii) debinding the green body to form a debound body; and (iv) subjecting the debound body to first-stage sintering at 1,050.degree.-1,250.degree. C. in a reducing or reduced-pressure atmosphere and then to second-stage sintering at a temperature in a range of 1,100.degree.-1,400.degree. C. which is higher than that of the first-stage sintering. This process can provide sintered Ti bodies and sintered magnetic bodies of the Fe-Si type, which have a density ratio of at least 95%.