Abstract: A magnetic recording/reproducing apparatus being able to use a normal-sized cassette and a small sized cassette according to a user's selection. The apparatus comprises a supply reel stand for engaging with a supply reel; a supply reel stand base for supporting the supply reel stand; a take-up reel stand for engaging with a take-up reel; a take-up reel stand base for supporting the take-up reel stand; a reel stand displacing mechanism for displacing the supply reel stand base and the take-up reel stand base according to a size of the normal-sized cassette and a size of the small sized cassette. The reel stand displacing mechanism displaces the supply reel stand base and the take-up reel stand base by using a drive force transmitted from the tape loading mechanism.

Abstract: A magnetic recording and reproducing device comprises a tape guide mechanism for taking up the tape within the cassette when unloaded state, and withdrawing the tape from the cassette so as to wind the tape on the rotary head drum when loaded state. The mechanism comprises a first guide slot, a first moving member, and a first guide roller provided on the first moving member. The center line of the tape wound on the first guide roller lies in the reference plane. The mechanism comprises a second guide slot provided on take-up reel side and having a slanting part, a second moving member, and a second guide roller provided on the second moving member. The second guide roller rotates about a second axis having a predetermined tilt angle and a predetermined direction angle so that the center line of the tape is situated lower than the reference plane, is wound from the rotary head drum so that the center line of the tape is oriented toward the reference plane.

Abstract: An artificial blood vessel comprising a tube of a porous synthetic polymer on a surface of which a protein or a peptide having cell adhesion and growth functions is covalently bonded through hydroxyl groups, carboxyl groups, epoxy groups or amino groups. Its surface is uniformly composited stably with the material having the tissue induction function by the covalent bond without deforming a shape of the porous synthetic polymer material. Therefore, no initial thrombus is induced, and the intima is quickly formed and remains stably for a long time.

Abstract: A read only memory capable of writing data, which is provided with a number of "0" judging circuit (8) judging whether or not the number of bits of "0" of data to be written in the memory cell array (1) is more than a half or more of a predetermined bit length, a monitor bit cell group (9) storing the above judge result by corresponding it to the respective data, and with a data inverting select circuit (12) outputting the values of the respective bits of the data after inverting them to a data writing/reading circuit (2) when the number of bits of "0" in the data to be written is judged to be a half or more of the predetermined bit length, and outputting the values of the respective bits of data read from the memory cell array (1) after inverting them when the monitor bit cell group (9) stored that the number of bits of "0" in the data to be read is a half or more of the predetermined bit length, and is capable of reducing an aluminum width of a power source of a PROM, and, when the data length to be written

Abstract: An optical fiber which has a cladding made of a cured material of a photosetting resin composition comprising at least one compound which has at least two unsaturated bonds in a molecule and a photopolymerization initiator, no compound which has only one unsaturated bond in a molecule being present in the composition, has excellent mechanical properties.