摘要:
A feeding apparatus wherein a carrying tape (1) accommodating components (5) is fed along a guide (2) and a cover tape (1b) is peeled off before a component feeding position (30), whereby a component (5) is fed, the apparatus having:
a shutter (35) which covers the carrying tape at the feeding position and is movable to open the feeding position, the shutter having a slit (36) through which the cover tape is drawn; and peeling-off and taking-up means for pulling the cover tape to peel off and wind up the cover tape,
wherein, with respect to the slit, a distance between a top surface of the guide and the shutter on one side of the feeding position is smaller substantially by the thickness of the cover tape than a distance between that top surface and the shutter at a portion on the opposite side of the component feeding position.
摘要:
The device of this invention has a holder (12, 28) for holding the work (9, 27), work shafts (25, 26) on each of which the holder is mounted, and each of which feeds in the work in the axial direction, and grinding tools (15, 16) each arranged at a specified slope angle for grinding the aforementioned work (9, 27) to the prescribed spherical shape, the aforementioned work shafts (25, 26) and grinding tools (15, 16) being adapted for rough grinding and for precision grinding, respectively, and it is equipped with a transferring device (11, 13, 32, 33) for bringing the holder (12, 28) holding the aforementioned work (9, 27) to the work shaft (25) for rough grinding and to the work shaft (26) for precision grinding, further, the work shaft (25) for rough grinding being provided with a mechanism for forced cutting-in against the grinding tool (15), and the work shaft (26) for precision grinding with a mechanism for constant pressure cutting-in, whereby well finished surface may be realized at high efficiency and after-processings are spared. Accordingly, this invention is quite advantageous in maintenance and control of precision and cost reduction.
摘要:
The device of this invention has a holder (12, 28) for holding the work (9, 27), work shafts (25, 26) on each of which the holder is mounted, and each of which feeds in the work in the axial direction, and grinding tools (15, 16) each arranged at a specified slope angle for grinding the aforementioned work (9, 27) to the prescribed spherical shape, the aforementioned work shafts (25, 26) and grinding tools (15, 16) being adapted for rough grinding and for precision grinding, respectively, and it is equipped with a transferring device (11, 13, 32, 33) for bringing the holder (12, 28) holding the aforementioned work (9, 27) to the work shaft (25) for rough grinding and to the work shaft (26) for precision grinding, further, the work shaft (25) for rough grinding being provided with a mechanism for forced cutting-in against the grinding tool (15), and the work shaft (26) for precision grinding with a mechanism for constant pressure cutting-in, whereby well finished surface may be realized at high efficiency and after-processings are spared. Accordingly, this invention is quite advantageous in maintenance and control of precision and cost reduction.
摘要:
The resistance layer formed on an inner face of the cathode ray tube has a resistance value with small dependency on sintering temperature and a superior characteristic of load and temperature. The resistance layer contains RuO 2 having a particle size of 0.05 to 0.4 µm and the glass powder having a particle size of 0.01 to 2.0 µm and if necessary metal oxides having a particle size of 0.05 to 2.0 µm. The glass composition is preferably a PbO-B 2 O 3 -SiO 2 -Al 2 O 3 -ZnO system.