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Machine translation
1. (WO1981000859) CARBURIZING TUB APPARATUS AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000859    International Application No.:    PCT/US1979/000792
Publication Date: 02.04.1981 International Filing Date: 27.09.1979
IPC:
C21D 1/74 (2006.01), C23C 8/06 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00792 27.09.1979 WO
Title (EN) CARBURIZING TUB APPARATUS AND METHOD
(FR) PROCEDE ET DISPOSITIF POUR CUVES DE CARBULATION
Abstract: front page image
(EN)Parts (12) to be treated are placed in grid bottomed tubs (14a, 14b, 14c) and the tubs (14a, 14b, 14c) are stacked one upon the other. A flow of treating gas is directed exteriorly about and internally through the tubs (14a, 14b, 14c) from an entrance end (26) to an exit end (28). If the parts (12) in the entrance tub or tubs (14a, 14b) are sufficiently but not overly treated, it has been found that the parts (12) near the exit end (28) of tub or tubs (14b, 14c) are not sufficiently treated. If the parts (12) near the exit end (28) tub or tubs (14b, 14c) are sufficiently treated, then the parts (12) in the entrance end (26) of tub or tubs (14a, 14b) are over treated. This problem is solved by providing a member (31) having at least on lateral aperture (32, 32" or 32"") in a stacked column (16) of the tubs (14a, 14b, 14c) intermediate the ends (26 and 28) thereof and provides a flow of gas through the aperture (32, 32" or 32"") from the exterior of the column (16). This provides a proper gas concentration in the tub or tubs (14b, 14c) near the exit end (28) as well as in the tub or tubs (14a, 14b) at the entrance end (26).
(FR)Des pieces (12) a traite sont placees dans des cuves dont 1 fond est constitue par une grille (14a 14b, 14c) et ces cuves (14a, 14b, 14c sont empilees les unes sur les autres Un flux de gaz de traitement est dirige exterieurement autour et a l"inte rieur a travers les cuves (14a, 14b 14c) depuis une extremite d"admission (26) vers une extremite de sortie (28), Si les pieces (12) dans la ou les cuves d"admission (14a, 14b) sont traitees de facon suffisante mais non excessive, on a remarque que les pieces (12) situees pres de l"extremite des sorties (28) de la cuve ou des cuves (14b, 14c) ne sont pas traitees de facon suffisante. Si les pieces (12) pres de l"extremite de sortie (28) de la cuve ou des cuves (14b, 14c) sont traitees de facon suffisante, les pieces (12) situees a l"extremite d"admission (26) de la cuve ou des cuves (14a, 14b) sont traitees de facon excessive. Ce probleme est resolu en prevoyant un organe (31) possedant au moins une ouverture laterale (32, 32"ou 32"") et place entre les extremites (26 et 28) d"une colonne (16) de cuves empilees (14a, 14b, 14c) qui fournit un flux de gaz a travers l"ouverture (32, 32"ou 32"") a partir de l"exterieur de la colonne (16). Ceci permet une concentration de gaz convenable dans la ou les cuves (14b, 14c) pres de l"extremite de sortie (28) aussi bien que dans la ou les cuves (14a, 14b) placees a l"extremite d"admission (26).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)