Tape cassette for short-time recording

Claim 2

A tape cassette for short-time recording having an interchangeability with a standard tape cassette for a long-time recording, said standard tape cassette having a casing with a tape stretched on the front side thereof, said casing having a small aperture formed in the bottom thereof and accommodating a pair of large reels retaining the terminal ends of said tape, said pair of large reels being capable of being positioned at predetermined positions with a predetermined reel axis distance preserved therebetween, said tape cassette for short-time recording comprising: a casing having the same maximum external size substantially the same as that of said casing of said standard tape cassette and having a large aperture formed in the bottom thereof, said large aperture having a greater area than said small aperture and covering the region of said small aperture, said casing of said tape cassette for short-time recording accommodating a pair of small reels to which the terminal ends of said tape are secured, such that they are capable of being positioned at said predetermined positions with the same reel axis distance as said large reels.

Claim 3

A tape cassette for short-time recording according to claim 1, wherein said casing has a recess extended rearwardly as viewed in the direction of said tape cassette, at a position different from that in the casing of said standard tape cassette.

Claim 4

A tape cassette for short-time recording according to claim 2, further comprising a front cover pivotally carried by both side walls of said casing and adapted to cover the front side of said tape stretched at the predetermined position, said front cover being provided with side panels provided with notches fromed in the lower portions thereof.

Claim 5

A tape cassette for short-time recording according to claim 1, wherein said casing has a first light-transmitting hole and a plurality of second light-transmitting holes which form a plurality of light paths in cooperation with said first light transmitting hole through the tape stretched in said casing.

Claim 6

A tape cassette for short-time recording according to claim 4, comprising a pair of light paths between said first light transmitting hole and said second light transmitting holes, corresponding to the pair of small reels.

Claim 7

A tape cassette for short-time recording according to claim 1, wherein said tape is connected to said pair of small reels through respective detection tapes having a light-transmissivity different from that of said tape, light transmitting holes formed in said casing such as to form light paths through said tape stretched in said casing, and light transmitting windows covering said light transmitting holes and arranged for detection of length of tapes wound on said small reels.

Claim 8

A tape cassette for short-time recording having an interchangeability with a standard tape cassette for a long-time recording, said standard tape cassette having a casing with a tape stretched on the front side thereof, said casing having a small aperture formed in the bottom thereof and accommodating a pair of large reels retaining the terminal ends of said tape through detection tapes having a different light-transmissivity from said tape, said pair of large reels being locatable at predetermined positions with a predetermined reel axis distance preserved therebetween, said casing further having sensor holes formed in the bottom thereof and adapted for allowing tape end detecting means to come thereinto such that light paths are formed through said tape stretched in said casing, said tape cassette for short-time recording comprising: a casing having the same maximum external size substantially the same as that of said casing of said standard tape cassette and having a large aperture formed in the bottom thereof, said large aperture having a greater area than said small aperture and covering the region of said small aperture, said casing of said cassette for short-time recording further having a recess formed in the bottom wall thereof such as to continue from said large aperture substantially perpendicularly to and behind said tape stretched at the predetermined position from the position corresponding to said sensor hole formed in said casing of said standard tape cassette, said casing of said tape cassette for short-time recording accommodating a pair of small reels to which the terminal ends of said tape are secured, such that they are capable of being at said predetermined positions with the same reel axis distance as said large reels.

Claim 9

A tape cassette for short-time recording having an interchangeability with a standard tape cassette for a long-time recording, said standard tape cassette having a casing with a tape stretched on the front side thereof, said casing having a small aperture formed in the bottom thereof and accommodating a pair of large reels retaining the terminal ends of said tape through detection tapes having a different light-transmissivity from said tape, said pair of large reels being locatable at predetermined positions with a predetermined reel axis distance preserved therebetween, said casing further having sensor holes formed in the bottom thereof and adapted for allowing tape end detecting means to come thereinto such that light paths are formed through said tape stretched in said casing, said tape cassette for short-time recording comprising: a casing having the same maximum external size substantially the same as that of said casing of said standard tape cassette and having a large aperture formed in the bottom thereof, said large aperture having a greater area than said small aperture and covering the region of said small aperture, said casing of said cassette for short-time recording further having a recess formed in the bottom wall thereof such as to continue from said large aperture substantially perpendicularly to and behind said tape stretched at the predetermined position from the position corresponding to said sensor hole formed in said casing of said standard tape cassette, said casing of said tape cassette for short-time recording accommodating a pair of small reels to which the terminal ends of said tape are secured, such that they are capable of being at said predetermined positions with the same reel axis distance as said large reels.