Abstract:
A cylinder head structure for an engine, including grooves (18; 12a) in a top surface (2; 2a) of a cylinder head body (1; 1a) such that they surround an associated a fuel injection nozzle hole (11; 8a). Valve tappet guide holes (6; 3a) are also formed in the top surface (2; 2a) of the cylinder head body (1; 1a) around each of the fuel injection nozzle holes (11; 8a). The grooves (18; 12a) connect the adjacent tappet guide holes (6; 3a) and surround the associated nozzle or spark plug hole. Cylinder head bolt holes (15; 9a) are also formed around the tappet guide holes (6; 3a). When cylinder head bolts are tightened to join the cylinder head with a cylinder block, a radiant tension (F) is generated from the cylinder head bolt heads which are in contact with the cylinder head top surface. This radiant tension would cause cracking around the injection nozzle hole (11; 8a). The grooves (18; 12a) interrupt transmission of the radiant tension to the vicinity of the injection nozzle hole to prevent occurrence of cracking.
Abstract:
The dimension of a compressor is decreased, to facilitate the installation of the compressor in a limited space, by installing a relief valve (50) in such a manner that the relief valve (50) does not protrude from the outer peripheral surface of a closed housing (1) of a compressor, in which a compression mechanism, incorporated in a closed housing, is driven by an external drive source via an electromagnetic clutch.The means for achieving the above object is to assemble the relief valve (50) to the closed housing (1) in such a manner that the relief valve (50) does not protrude from the outer peripheral surface of the housing (1) in order to discharge gas to the outside when the gas pressure in the closed housing (1) increases abnormally.
Abstract:
In a laser beam printer, automatic optical quantity (APC) control is performed based on an optical quantity detection output to generate a laser beam having a predetermined quantity of light. In each scanning cycle, APC is effected by utilizing a period (unblanking period) in which the laser device is forcibly actuated to generate a horizontal synchronization signal. The unblanking period may be changed according to the print paper size or image formation/non-image-formation periods. Also, light quantity control may be effected through a plurality of scanning cycles before image formation and may be effected by utilizing the unblanking period during the period corresponding to the intervals of print sheets. Techniques also provided to prevent a transfer unit from being contaminated by toner images formed as a byproduct of APC.
Abstract:
A torque fluctuation absorbing apparatus includes a torque input member coaxially assembled with an output member through a plurality of circumferentially equally spaced resilient elements in such a manner that the resilient elements are enclosed by the torque input member and maintained in engagement with the torque input and output members to transmit input torque from the input member to the output member. The output member has a hub portion formed with a plurality of circumferentially equally spaced through holes through which a plurality of mounting bolts are inserted and threaded into a hub portion of the torque input member for connection to a drive shaft. The through holes of the output member are each formed to contain the head portion of one of the mounting bolts in such a manner as to permit relative rotaion of the torque input and output members. The through holes of the output member are each formed with an internal surface for engagement with the head portion of the respective mounting bolts in the event the resilient elements are damaged.
Abstract:
A method of setting molding conditions for an injection molding machine 1 using a mold 2 whose specifications data are unclear included three setting processes. In the first setting process A, by inputting known data into controller 3, the molding conditions based on a data base prepared in advance and said input known data are set. In the second setting process B, injection molding is performed according to prescribed molding conditions pre-selected concerning injection pressure P, injection speed V and the injection start position of screw 4, and then, based on the product just molded, injection pressure P is altered, to set said altered injection pressure P, injection speed V and proper pre-feed measurement value Md as molding conditions. In the third setting process C, injection molding is performed according to molding conditions obtained from said second setting process B, and subsequently, taking into account the findings from the product just molded, said molding conditions are adjusted. In this manner, even an unskilled operator is allowed to undertake setting molding conditions reliably and with great ease for an injection molding machine loaded with a set of molds whose specifications data are unclear.
Abstract:
An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result throughput is increased without causing other problems.
Abstract:
An image forming apparatus comprises image information which outputs a sync signal and generated image information synchronously with the sync signal; an image forming apparatus forms an image on the basis of the image information at either one of a plurality of resolutions and which generates a sync request signal to request a transmission of the sync signal; and a resolution changeover means.When the image forming unit received the resolution change over request signal before the sync request signal is generated, the image forming unit executes the switching operation of the resolution, and if the image forming unit received the resolution changeover request signal after the sync request signal had been generated, the image forming unit does not execute the switching operation of the resolution.
Abstract:
In a laser beam printer, automatic optical quantity (APC) control is performed based on an optical quantity detection output to generate a laser beam having a predetermined quantity of light. In each scanning cycle, APC is effected by utilizing a period (unblanking period) in which the laser device is forcibly actuated to generate a horizontal synchronization signal. The unblanking period may be changed according to the print paper size or image formation/non-image-formation periods. Also, light quantity control may be effected through a plurality of scanning cycles before image formation and may be effected by utilizing the unblanking period during the period corresponding to the intervals of print sheets. Techniques also provided to prevent a transfer unit from being contaminated by toner images formed as a byproduct of APC.
Abstract:
An image forming apparatus comprises a data receiver for receiving encoded character or graphic information in the unit of a page from the outside; a pixel converter for converting the encoded character or graphic information into pixel information; an image forming device for forming an image on a recording medium based on the pixel information; and a feeder for feeding the recording medium to said image forming device. In the apparatus, the feeder is adapted to feed the recording medium to a predetermined position prior to the completion of pixel conversion of a page by the pixel converter.
Abstract:
There is disclosed a column for use in a continuous particle separation apparatus utilizing a centrifugal field. The column comprises a column base constituting an outer frame, a spacer having a cutout portion at its center, an intermediate ring having a slot and a variable diameter, and a top ring mounted inside the intermediate ring. The intermediate ring has an inlet port and an outlet port for introducing and discharging fluid near the slot. The intermediate ring has an inclined inner surface. The top ring has an inclined outer surface which is pressed against the inclined inner surface of the intermediate ring to expand the intermediate ring. Thus, the spacer is pressed against the base. A separation channel is formed between the inner wall of the base and the intermediate ring within the cutout portion of the spacer.