摘要:
A process for producing a printed wiring board-forming sheet comprising a resin sheet having a through hole in the thickness direction and a metal chip inserted in the through hole. The sheet is produced by placing a resin sheet and conductive metal sheet in this order on a die base having a die hole, performing punching from the conductive metal sheet side to form a punched hole in the conductive metal sheet and to form a punched hole in the resin sheet and inserting the punched conductive metal chip in the through hole of the resin sheet whereby the front and back surfaces of the sheet can be electrically connected to each other. If the conductive metal chip is so inserted that its tip protrudes from the surface of the sheet, and if a large number of such substrates are laminated, electrical connection in the thickness direction can readily be made by virtue of the protruded conductive metal chips and a multi-layer board can be readily produced.
摘要:
A pen recorder has two movable bases adapted to be movable in directions along a platen, one of the bases being driven in directions along the platen. A plurality of pens are mounted in parallel on one of the bases, and a hammer is mounted on the other base for pressing any one of the pens toward the platen. The base which is not driven has a lock lever adapted to engage with a plurality of portions of the base which is driven. The base which is not driven further has an urging lever for driving the lock lever. The urging lever is slidably mounted on a pen changeover shaft rotated by a driving mechanism. The pen recorder further has a spring for urging the lock lever in the locking direction, as well as forcing the urging lever to abut against the lock lever in the unlocking direction. Also disclosed is a method of setting the initial position of the pen recorder. The method comprises the steps of: starting a pulse motor for pulling one of the bases under the state where the bases are connected through the lock mechanism, to move one of the bases to its dead point; making the pulse motor step out after the dead point is reached; canceling the locking to separate the bases from each other; moving the other base to its dead point; and making the pulse motor step out again after the other base reaches its dead point, thereby to set the initial positions of both the bases.
摘要:
A printer is provided to improve the conveying accuracy of a Y-bar, thus improving printed image quality. The printer includes the Y-bar that extends in a first direction above a flatbed on which a medium is mounted, holds an ink droplet ejecting head unit so that the head unit is movable in the first direction, and is held so as to be movable with respect to the flatbed in a second direction perpendicular to the first direction. The printer includes a drive mechanism that conveys the Y-bar in the second direction, a drive control device that carries out a drive control of the drive mechanism, and a measuring device that directly measures an amount of movement of the Y-bar with respect to the flatbed. The drive control device corrects controlled variables of the drive mechanism based on the amount of movement of the Y-bar measured by the measuring device.
摘要:
In a method of manufacturing a lead frame for use in a leadless package such as a quad flat non-leaded package (QFN), a base frame is first formed which includes a region for resin-molding a plurality of semiconductor elements to be mounted on one surface of the base frame, the region being partitioned into land shapes, and in which a die-pad portion and lead portions around the die-pad portion are defined severally for the individual semiconductor elements to be mounted in each of the partitioned regions for resin-molding. Next, an adhesive tape is attached to the other surface of the base frame, and subsequently a cut portion is provided at a portion corresponding to a region between two adjacent partitioned regions for resin-molding, of the adhesive tape.
摘要:
A printer is provided to improve the conveying accuracy of a Y-bar, thus improving printed image quality. The printer includes the Y-bar that extends in a first direction above a flatbed on which a medium is mounted, holds an ink droplet ejecting head unit so that the head unit is movable in the first direction, and is held so as to be movable with respect to the flatbed in a second direction perpendicular to the first direction. The printer includes a drive mechanism that conveys the Y-bar in the second direction, a drive control device that carries out a drive control of the drive mechanism, and a measuring device that directly measures an amount of movement of the Y-bar with respect to the flatbed. The drive control device corrects controlled variables of the drive mechanism based on the amount of movement of the Y-bar measured by the measuring device.
摘要:
A separator 10 includes a separator body 11 and a collector 12. The separator body 11 prevents mixed flow of fuel gas and oxidizer gas. The collector 12 is formed from a metal lath MR in which the angle between the direction of formation of strand portions (through-hole formation portions) for forming through holes in a meshy, step-like arrangement and the direction of formation of bond portions (connection portions) for connecting the strand portions to one another is about 60 degrees. By virtue of this, the thickness of the collector 12 can be increased through reduction in pitch P. Thus, a good gas supply performance is ensured through reduction in pressure loss of introduced gas, and water generated in an MEA 30 can be well drained by capillary action which arises in the through holes.
摘要:
A printer includes a first drive sub-assembly and a second drive sub-assembly detachably provided on the first drive sub-assembly. The first drive sub-assembly includes a bed configured to support a material to be printed, a first engaging member, and a front-rear direction moving mechanism provided on one side of the bed and configured to move the first engaging member along a front-rear direction. The second drive sub-assembly includes a guide bar having a longitudinal direction substantially perpendicular to the front-rear direction, a right-left direction moving mechanism configured to move a printer head along the longitudinal direction of the guide bar, and a second engaging member engaging with the first engaging member to move the guide bar along the front-rear direction.
摘要:
Each of collectors 22 of an electrode structure 20, which partially constitutes a polymer electrolyte fuel cell, is formed from a metal lath MR having a large number of through-holes. A stopping portion 22a in which the through-holes are reduced in diameter is formed at a peripheral end portion of the collector 22. The peripheral end portion of the collector 22 is folded; subsequently, the folded peripheral end portion is pressed, thereby forming the stopping portion 22a. A resin seal portion 23 for sealing introduced fuel gas and oxidizer gas is formed integrally with the stopping portions 22a by insert molding which is performed such that an injected molten resin encloses the stopping portions 22a. The resin seal portion 23 formed integrally with the stopping portions 22a can reliably prevent inflow of the molten resin toward central portions of the collectors 22.
摘要:
A printer includes a first drive sub-assembly and a second drive sub-assembly detachably provided on the first drive sub-assembly. The first drive sub-assembly includes a bed configured to support a material to be printed, a first engaging member, and a front-rear direction moving mechanism provided on one side of the bed and configured to move the first engaging member along a front-rear direction. The second drive sub-assembly includes a guide bar having a longitudinal direction substantially perpendicular to the front-rear direction, a right-left direction moving mechanism configured to move a printer head along the longitudinal direction of the guide bar, and a second engaging member engaging with the first engaging member to move the guide bar along the front-rear direction.
摘要:
In a method of manufacturing a lead frame for use in a leadless package such as a quad flat non-leaded package (QFN), a base frame is first formed which includes a region for resin-molding a plurality of semiconductor elements to be mounted on one surface of the base frame, the region being partitioned into land shapes, and in which a die-pad portion and lead portions around the die-pad portion are defined severally for the individual semiconductor elements to be mounted in each of the partitioned regions for resin-molding. Next, an adhesive tape is attached to the other surface of the base frame, and subsequently a cut portion is provided at a portion corresponding to a region between two adjacent partitioned regions for resin-molding, of the adhesive tape.