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(11)    Patent No :    AP 2765   
(21)    Application No :    AP/P/2008/004395   
(22)    Filing Date :    28.09.2006   
(24)    Date of Grant &    23.09.2013   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
ZA    2005/07923    30.09.2005

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
(73) Applicant(s)
GREIF  SOUTH AFRICA (PRORIETARY) LIMITED, Martin

Boulevard, Vanderbijlpark, 1911,
South Africa
(72 Inventors

WENTZEL Louis Martin, South Africa

(74) Representative

FISHER CORMACK & BOTHA
 

(51)    International  Classification   B05B 13/02 (2006.01
(54)    Title

Drum manufacture

(57)    Abstract

The invention concerns a method of manufacturing steel drums on a production line. In the method, flat, unpainted steel sheets (10) are initially rolled to cylindrical forms. The free edges of the forms are then welded to one
another to produce cylindrical bodies (18). Thereafter the cylindrical bodies are transported stepwise and with their axes upright, typically by means of a walking beam conveyor (22) through an external painting and internal treatment booth (23). In this booth each body is initially deposited at each of one or more roller spray stations (24) with the lower end of the body locating on a circular array of rollers (25) which stiffen the body and the rollers are rotated to cause the body to rotate while paint is sprayed onto its external surface. The externally painted bodies are t hen deposited at an internal coating station (32) at which the internal surface of the body is coated with an appropriate treatment. The externally painted and internally coated bodies are moved out of the booth and through a curing oven in which curing of the paint and internal coating takes place.

(56)    Documents Cited :    WO2004067204 A1    JP59177216 A    JP3270757 A    US2613634 A    US2613631 A

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