Abstract: In a shadow mask 1 of pressing type, a large number of slots are made in a mask body in the horizontal direction and in the vertical direction. Each slot has a roughly rectangular backside opening, a roughly rectangular front-side opening, and a through-hole that connects these two openings. Between each slot of the multiple slots made in the mask body that is situated at least on either of the two diagonal axes of the mask body but in such a position that the angle at which electron beams enter the slot is 20 degrees or more and another slot that is arranged adjacently to the above slot in the vertical direction, a connecting part connecting the peripheral-side vertical outer edges of the front-side openings of these slots is provided so that it runs through a horizontal bridge part formed between the front-side openings of the slots.

Abstract: A slot tension-type shadow mask for the cathode-ray tube (CRT) has slots. Each slot has two openings and a pseudo-bridge between the two opening of the slot. The slots are formed in the X-Y plane that is formed away from the electron gun in the Z-axis. Each pseudo bridge has a pair of protuberances separated by a lacuna. The edges of each protuberance is etched to have various surface profiles in the X, Y, Z directions and/or the shape of the lacuna is also varied to provide effective shielding while overcoming various problems associated with heating and image imperfections appearing on the CRT screen.

Abstract: In a shadow mask 1 of pressing type, a large number of slots 2 are made in a mask body 1a in the horizontal direction X and in the vertical direction Y. Each slot 2 has a roughly rectangular backside opening 33, a roughly rectangular front-side opening 32, and a through-hole 31 that connects these two openings 33, 32. Between each slot 2d, of the multiple slots 2 made in the mask body 1a, that is situated at least on either of the two diagonal axes 5 of the mask body 1a but in such a position that the angle at which electron beams 7 enter the slot 2d is 20 degrees or more and another slot that is arranged adjacently to the above slot 2d in the vertical direction, a connecting part 23 connecting the peripheral-side vertical outer edges 22a, 22b of the front-side openings 32 of these slots 2d is provided so that it runs through a horizontal bridge part 24 formed between the front-side openings 32 of the slots 2d.

Abstract: A shadow mask with a slot having a substantially rectangular shape and a curved slot. The rectangular slot is composed of a back side opening formed on an electron beam incident side, a front side opening having a large area to allow the electron beam to pass, and a side wall sections inclining between the back side opening and the front side opening. The curved slot is composed of a back side opening (11) formed on the electron beam incident side and curved such that both longitudinal end portions are apart from an axis of ordinate passing a central portion of the shadow mask, a front side opening (2) formed having a large area to allow the electron beam to pass and side wall section (3 - - - 6) inclining between the back side opening and the front side opening.

Abstract: A slot tension-type shadow mask for the cathode-ray tube, slots of which are provided with a pseudo-bridge, and the pseudo-bridge is provided with the deviation in the Y-axis direction, is disclosed. The deviation in the Y-axis direction means the condition that, in the relation between the width of the etching part at the mask outer peripheral edge part side (outside etching part) in the Y-axis direction and the width of the etching part at the mask center part side (inside etching part) in Y-axis direction on the surface facing to a screen (being opposite in direction to an electron gun) , the inside etching part is longer than the outside etching part. The outside etching part means a part between an endmost point a of the protuberance at the mask outer peripheral side in the Y-axis direction and a surface edge point b of the protuberance at the outer peripheral side in the Y-axis direction on the surface facing to the screen.