(19)
(11) EP 0 374 482 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.01.1991 Bulletin 1991/03

(43) Date of publication A2:
27.06.1990 Bulletin 1990/26

(21) Application number: 89121273.0

(22) Date of filing: 17.11.1989
(51) International Patent Classification (IPC)5B41F 7/26
(84) Designated Contracting States:
DE FR GB

(30) Priority: 23.12.1988 US 289612

(71) Applicant: HARRIS GRAPHICS CORPORATION
Dover New Hampshire 03820 (US)

(72) Inventors:
  • Guaraldi, Glenn Alan
    Kingston New Hampshire 03848 (US)
  • Skowron, Michael
    Dover New Hampshire 03824 (US)

(74) Representative: Stoltenberg, Heinz-Herbert Baldo 
c/o Heidelberger Druckmaschinen AG Kurfürsten-Anlage 52-60
D-69115 Heidelberg
D-69115 Heidelberg (DE)


(56) References cited: : 
   
       


    (54) Apparatus for preventing undesired fluid flow past a flow control location


    (57) An apparatus is disclosed for controlling fluid flow at a flow control location between first and second rollers (12, 16). Each roller is rotatable about its longitudinal central axis. The two rollers (12, 16) are disposed adjacent to each other so as to form a flow control location or nip (18) between the rollers. The nip (18) has an entrance side (11) and an exit side (13). As the rollers (12, 16) rotate, fluid from a fluid pan (14) is carried on the outer surface of the first roller (12) to the entrance side (11) of the nip (18). Some of the fluid at the nip (18) is transferred onto the outer surface of the second roller (16). As the rollers (12, 16) continue to rotate, the fluid flows out of the nip at the exit side (13) of the nip (18). An excess fluid condition occurs at the nip (18) when the amount of fluid flow to the entrance side (11) of the nip (18) exceeds the amount of fluid flow from the exit side (17) of the nip (18). A brass collar (30) is connected at one end of the first roller (12). Another brass collar (35) is connected at the other end of the first roller (12). The two brass collars (30, 35) rotate with the first roller (12) and cooperate to prevent excess fluid at the entrance side (11) of the nip (18) from flowing around the opposite axial ends of the nip (18) onto the second roller (16). This is accomplished by the two brass collars (30, 35) picking up excess fluid at the entrance side (11) of the nip (18) and subsequently transferring the excess fluid back to the fluid pan (14).





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