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    • 4. 发明申请
    • CLEANING APPARATUS AND CLEANING METHOD
    • 清洁装置和清洁方法
    • WO1997045268A1
    • 1997-12-04
    • PCT/JP1997001784
    • 1997-05-26
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.SARASHINA, EigoTAKAHASHI, KenMASUI, MasuoNAITO, Takao
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • B41F35/00
    • H05K3/1233B41F35/005H05K3/1216H05K3/26H05K2203/0139
    • In a printer in which a printing material is printed on and applied to an object surface via a printing screen mask provided with an opening of a predetermined pattern, cream solder remaining in the opening of the screen mask is removed reliably. A flow rate of the air in an air suction mechanism (19) can be controlled by a flow rate controller (20). After an air sucker (15) has moved up, so that an upper end thereof has contacted the screen mask (5), the sucking of the air is started with respect to the opening (6) of the screen mask (5), whereby a cleaning operation is carried out. The residual cream solder (4) in the opening (6) is examined by an inspection camera (2) after the completion of this cleaning operation, and a cleaning operation is carried out again with the flow rate of the suction air controlled in accordance with the results of the examination.
    • 在其中通过设置有预定图案的开口的印刷屏蔽掩模将印刷材料印刷并施加到物体表面的打印机中,可靠地移除残留在屏幕掩模的开口中的膏状焊料。 空气吸入机构(19)中的空气的流量可以由流量控制器(20)控制。 在吸气器(15)上升之后,使其上端与屏幕面罩(5)接触,相对于屏幕面罩(5)的开口(6)开始抽吸空气,由此 进行清洁操作。 在清洁操作完成后,通过检查照相机(2)检查开口(6)中的残留的膏状物焊料(4),并且再次按照根据下述方式控制的吸入空气的流量进行清洁操作 检查结果。
    • 6. 发明申请
    • SCREEN PRINTING METHOD AND SCREEN PRINTING APPARATUS
    • 屏幕打印方法和屏幕打印设备
    • WO1997008655A2
    • 1997-03-06
    • PCT/JP1996002432
    • 1996-08-30
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.TAKAHASHI, KenCHIKAHISA, NaoichiNAGASAWA, YousukeNAITO, TakaoWACHI, AkihikoYANACHI, SeishiroNAGAFUKU, NobuyasuKAKISHIMA, Nobuyuki
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • G06T11/20
    • B41F15/0818H05K3/1233H05K3/3484H05K2201/09727H05K2203/0139H05K2203/0264H05K2203/0783H05K2203/163
    • A screen printing method and apparatus print a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a, 5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121, 120) where the values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area. Upon an occurrence of print standby time during a printing operation, the print standby time is measured, and at a resumption of printing with the print standby canceled, the paste placed on the stencil during the standby time is screen-printed, by moving the squeegee at an adjusted print speed lower than the reference print speed based on a relationship between the print standby time and a print time due to the adjusted print speed after the resumption of printing.
    • 丝网印刷方法和装置通过移动刮板(5a,5b)将与模板(4)相对应的电路图案印刷到放置在可升降/定位台(2)上的打印物品(1)上, 水平地将刮板推入模板上,使得印刷浆料(9)经由模板印刷到制品上。 将刮板提升到推入行程的程度,刮板被推入该冲压行程,此后通过向下移动工件将制品从模板分离开。 板被分为第一和第二区域(121,120),其中沿着刮板移动方向的模板的开口尺寸的值小于并且不小于阈值,并且使得在第一区域处的刮板的速度 比第二区慢。 在打印操作期间发生打印待机时间时,测量打印待机时间,并且在打印待机状态下恢复打印被取消时,在待机时间期间放置在模板上的粘贴被丝网印刷,通过移动刮板 基于打印待机时间与打印时间之间的关系,该打印速度低于基准打印速度,该打印速度由于打印恢复后的调整打印速度而导致。
    • 9. 发明申请
    • PULSE WIDTH MODULATION CONVERTER
    • 脉冲宽度调制转换器
    • WO1998029937A1
    • 1998-07-09
    • PCT/JP1997004767
    • 1997-12-24
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.TAKADA, KazuyukiISOMURA, Yoshinori
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • H02M01/12
    • H02M1/4233H02M1/4216H02M7/219H02M7/53873H02M2007/53876Y02B70/126Y02E10/56
    • A PWM converter includes a power source current detector (9), current instruction generator (7), current controller (6) and a main circuit power control section (8), and the current controller is constituted of comparators (17, 18, 19) which compare the line current measurement results with the line current instruction values, and a logic circuit (10) which generates switching instruction signals (PU, PV, PW) based on the comparison results with use of timing signals so that the switching power devices (Q1-Q6) are selectively turned ON and OFF in the direction of reducing the difference between the line current measurement results and the line current instruction values, and thus essentially solves the prior art problems associated with gain adjustment of current error amplifiers, which is completely adjustment-free and yet inexpensive.
    • PWM转换器包括电源电流检测器(9),电流指令发生器(7),电流控制器(6)和主电路功率控制部分(8),电流控制器由比较器(17,18,19) ),其将线电流测量结果与线电流指令值进行比较;以及逻辑电路(10),其基于使用定时信号的比较结果生成切换指令信号(PU,PV,PW),使得开关功率器件 (Q1-Q6)在减小线路电流测量结果和线电流指令值之间的差异的方向上选择性地导通和截止,从而基本上解决了与电流误差放大器的增益调整相关的现有技术问题, 完全免调节而且价格便宜。