公开(公告)号：AU5243390A

公开(公告)日：1990-10-04

申请号：AU5243390

申请日：1990-03-30

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DREYER JUERGEN ,  RIEGGER SIEGFRIED ,  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：CA1233288A

公开(公告)日：1988-02-23

申请号：CA450343

申请日：1984-03-23

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  RIEGGER SIEGFRIED ,  FLOSS JOSEF G

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

Abstract: A process for removing volatile constituents from a polymer melt in a vented extrude, which comprises: passing the polymer melt containing the volatile constituents through one or more zones, with continuous formation of fresh surfaces, evaporating volatile constituents from this polymer melt in one or more such zones, and removing the vapors of volatile constituents, thus produced, from the zone or zones via a porous plate having a porosity of from 25 to 60% and a pore diameter of from 5 to 200 .mu.m. And an apparatus to carry out this process.

公开(公告)号：AU625661B2

公开(公告)日：1992-07-16

申请号：AU5243390

申请日：1990-03-30

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DREYER JUERGEN ,  RIEGGER SIEGFRIED ,  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：CA1222590A

公开(公告)日：1987-06-02

申请号：CA456616

申请日：1984-06-14

Applicant: BASF AG

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

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

Abstract: - 10 - O.Z. 0050/36564 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 250-300.degree.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 to 300.degree.C, wherein the aqueous salt solution is condensed under superatmospheric 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.