Magnetic tape cassette, window member and resin molding product
AssigneeFuji Photo Film Co., Ltd.
InventorTeruo Ashikawa
Life of this patent
Estimating the term…
Abstract
In a magnetic tape cassette, a window opening 2 covered with a window member 3 is formed in an upper half 1. At a peripheral portion of the window opening 2, a fixing surface 4 for fixing the window member 3 thereto is formed; and at a portion surrounding the fixing surface 4, a slant 6 is formed. Further, a build-up portion 8 is formed at the portion surrounding the fixing surface 4 and at a corner portion A on the opening portion side of the cassette case through which a magnetic tape passes. At a peripheral portion of the window member 3, a plurality of welded ribs 10 is formed. And, a weld line produced by the resin molding of the window member 3 is located on the welded rib 10.
Claims4
A magnetic tape cassette comprising:
- a cassette case having upper and lower halves;
- a tape reel accommodated in said cassette case;
- a magnetic tape wound on said tape reel and passing through an opening portion of said cassette case;
- and
- a window member set onto a window opening formed in said upper half;
- wherein a welded rib is formed at a peripheral portion of the window member and is brought into contact with a fixing surface formed at a peripheral portion of the window opening, and
- said window member is welded onto the fixing surface of said upper half by ultrasonic vibration;
- a weld line produced by resin molding of said window member is positioned on said welded rib.
A window member to be attached to a window opening of a cassette half, said window member comprising:
- a plurality of welded ribs at its the peripheral portion, wherein a weld line produced by resin molding of said wind member is positioned on at least one of said welded ribs.
A resin molding product comprising;
- a fixing portion having a plurality of welded ribs, wherein a weld line produced by resin molding is positioned on at least one of said welded ribs.
Dependencies are inferred from the claim text.