公开(公告)号：DE59006660D1

公开(公告)日：1994-09-08

申请号：DE59006660

申请日：1990-03-26

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DREYER JUERGEN ,  RIEGGER SIEGFRIED DR ,  SCHUHMACHER WILLI

IPC: F16F1/18 ,  G11B23/087

Abstract: A pressure spring for tape cassettes which consists of a spring steel strip which is, in particular, narrow and is of roughly uniform width comprises a flat central part and curved spring arms adjacent to said part and having a continuous curve. The flat central part has, as fastening parts, holes with indented fastening collars which, together with rivet pegs and recesses in a housing wall, form a roughly projection-free spring fastening, the riveted peg ending roughly at the spring surface. The pressure spring exhibits a straight line with a defined slope in the operating region of its spring characteristic. The pressure spring can be used for tape cassettes of all types, in particular for video cassettes.

公开(公告)号：DE3310676A1

公开(公告)日：1984-09-27

申请号：DE3310676

申请日：1983-03-24

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  RIEGGER SIEGFRIED DR ,  FLOSS JOSEF GEORG

IPC: C08G69/00 ,  B29C45/17 ,  B29C47/00 ,  B29C48/76 ,  C08F6/00 ,  C08G85/00 ,  C08F6/10

公开(公告)号：SG158394G

公开(公告)日：1995-04-28

申请号：SG158394

申请日：1994-10-27

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DREYER JUERGEN ,  RIEGGER SIEGFRIED DR ,  SCHUHMACHER WILLI

IPC: G11B23/087

公开(公告)号：HK995A

公开(公告)日：1995-01-13

申请号：HK995

申请日：1995-01-05

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DREYER JUERGEN ,  RIEGGER SIEGFRIED DR ,  SCHUHMACHER WILLI

IPC: F16F1/18 ,  G11B23/087

Abstract: A pressure spring for tape cassettes which consists of a spring steel strip which is, in particular, narrow and is of roughly uniform width comprises a flat central part and curved spring arms adjacent to said part and having a continuous curve. The flat central part has, as fastening parts, holes with indented fastening collars which, together with rivet pegs and recesses in a housing wall, form a roughly projection-free spring fastening, the riveted peg ending roughly at the spring surface. The pressure spring exhibits a straight line with a defined slope in the operating region of its spring characteristic. The pressure spring can be used for tape cassettes of all types, in particular for video cassettes.

公开(公告)号：DE3468886D1

公开(公告)日：1988-02-25

申请号：DE3468886

申请日：1984-06-13

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  SCHMIDT FRANZ DR ,  THEYSOHN RAINER DR ,  RIEGGER SIEGFRIED DR ,  HEIL EDUARD ,  FISCHER HERMANN DR ,  THOMA RICHARD DR ,  MATTHIES PAUL DR

IPC: C08G69/00 ,  C08G69/26 ,  C08G69/28 ,  C08L77/00

Abstract: Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.

公开(公告)号：DE3460459D1

公开(公告)日：1986-09-18

申请号：DE3460459

申请日：1984-03-21

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  RIEGGER SIEGFRIED DR ,  FLOSS JOSEF GEORG DR

IPC: C08G69/00 ,  B29C45/17 ,  B29C47/00 ,  B29C48/76 ,  C08F6/00 ,  C08G85/00

公开(公告)号：DE3321579A1

公开(公告)日：1984-12-20

申请号：DE3321579

申请日：1983-06-15

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  SCHMIDT FRANZ DR ,  THEYSOHN RAINER DR ,  RIEGGER SIEGFRIED DR ,  HEIL EDUARD ,  FISCHER HERMANN DR ,  THOMA RICHARD DR ,  MATTHIES PAUL DR

IPC: C08G69/00 ,  C08G69/26 ,  C08G69/28 ,  C08L77/00

Abstract: Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250 DEG -300 DEG C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 DEG to 300 DEG C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.