Abstract: An injection molding machine includes a sub-mold hollow structure defining a plurality of sub-mold hollows which are formed in at least one of a fixed-side base plate and a movable-side base plate with a keyway being formed in the base plate in which the sub-mold hollow structure is formed. A changeable sub-mold is detachably mounted in each of the sub-mold hollows, and a comb-shaped fixing key is detachably engaged in the keyway and fixes the changeable sub-molds when the comb-like fixing key is inserted into the keyway.

Abstract: A paper cassette used in a printer for holding sheets of paper. The cassette comprises a case holding sheets of paper and corner claws mounted at both sides of the front end of this case. The claws engage the front ends of the corners of the uppermost sheet of paper. The claws have front walls which are inclined upwardly toward the direction in which the uppermost sheet is fed. The front walls are also inclined from the front end of the uppermost toward the direction in which the walls are distant from the front end of the sheet by slow degrees toward the inside of the widthwise of the sheet. When the uppermost sheet is curled, the corners of the front end of the sheet are disengaged from the corner claws certainly.

Abstract: In the distance measuring device for an automatic focusing camera, the reliability is improved by preventing the device from electric noise, and the structure is simplified so as to provide interchangeability to reduce the production cost. A light receiving lens 2 and a multilayer printed circuit board 3 are mounted on a holder 1. A potting frame 6 is provided on the lens-facing side surface of the printed circuit board 3. An optical sensor 4 and an IC 5 are both mounted within a space 3 enclosed by the potting frame 6, and sealed by a protecting resin 7 simultaneously. Further, resistors S and capacitors C of a distance measuring circuit are mounted on the opposite surface of the printed circuit board 3. Both the surfaces of the printed circuit board 3 are connected to each other via a through hole to construct the distance measuring circuit. The protecting resin 7 transmits light having specified wave lengths.

Abstract: A shutter control device for a camera includes a control arrangement for controlling the opening and closing of the shutter as a function of an exposure value and a diaphragm value. The control arrangement stores values corresponding to a predetermined diaphragm setting, and employs the parameters of the predetermined setting and the exposure value and diaphragm value in order to determine the opening time of the shutter. In another arrangement, the control arrangement determines the effective exposure time as a function of the brightness of the object, distance to the object and a diaphragm, and employs this effective exposure time and a stored correction factor to determine the actual exposure time.

Abstract: An automatic sub-mold changer for use in an injection molding machine having a pair of molds in which sub-molds are detachably installed in an open state of the molds includes a sub-mold stock device for stocking plural sub-molds therein, the sub-mold stock device being spaced from the pair of molds on the injection molding machine. An arm device having an end portion which carries chucks to which the sub-molds are detachably affixed is movable between a first position juxtaposed to the sub-mold stock device and a second position juxtaposed to the pair of molds on the injection molding machine.

Abstract: A photographic copier includes a rod lens array held to a carrier and moved parallel to an original picture by a motor. Limit switches sense whether the array is in either stop position at both ends of the range of movement During movement, if the array is found to reach either stop position, then a control circuit stops the operation of the motor. When the rod lens array is started, if the limit switches sense that the rod lens array is not in either stop position, then the control circuit operates the motor to return the array to either stop position.

Abstract: A camera shutter system includes a matrix memory, an arrangement for determining the initial speed of a shutter sector, and a source of exposure values. The memory stores shutter-exposure pulse data elements, and is addressed by functions of the determined speed and the exposure values. A motor coupled to the sector is controlled in response to an accessed pulse data element. The data elements may relate only to variable portions of movement of the shutter, and be added to fixed values in order to minimize the size of the memory.

Abstract: A method for perforating a printed circuit board on two perforating position identifying patterns using two perforating devices which have respective coordinate systems, wherein the two patterns are imaged by TV cameras. The pattern positions are detected by an image processing device with image signals. An inter-pattern spacing is calculated based on the detected values of the pattern positions, using an arithmetic circuit. An error between an inter-perforating-hole spacing and an inter-pattern spacing is calculated. Perforating positions are calculated from the patterns by the arithmetic circuit. A perforating control circuit controls the two perforating members to perforate at the printed circuit board at the same time.

Abstract: A printer improved in the accuracy of detection as to whether or not recording paper exists. The printer has a sensor provided upstream a printing head in a paper feed direction to detect whether or not recording paper exists, a device for measuring a paper feed quantity of the recording paper, a central processing unit that controls the measuring device and a printer control circuit, and a comparator that makes a comparison between the measured paper feed quantity and a predetermined value. When "paper empty" is detected by the sensor, the central processing unit judges it to be "real paper empty" when no "paper existence" is detected during the period that predetermined paper feed is conducted after the detection of the "paper empty", and then suspends the printing operation. Thus, it is possible to prevent the central processing unit from erroneously judging a printed portion of the recording paper to be the trailing end of the recording paper.

Abstract: An ink ribbon cassette in which at least one of both side walls of a chamber in which an ink ribbon is accommodated is inclined as viewed in plan view relative to a ribbon portion exposed from openings formed in corresponding two arms, one extending from each end of the chamber.

Abstract: A range meter for a camera has a plurality of irradiation sources for irradiating beams in different directions, and a plurality of receivers for receiving reflected irradiation, the receivers providing outputs responsive to the point of the respective receiver that receives irradiation. In order to adapt the meter for measurement in different distance ranges, the outputs of the receivers are sensed in response to irradiation from different sets of the sources.