(19) |
 |
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(11) |
EP 0 374 482 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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16.01.1991 Bulletin 1991/03 |
(43) |
Date of publication A2: |
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27.06.1990 Bulletin 1990/26 |
(22) |
Date of filing: 17.11.1989 |
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(51) |
International Patent Classification (IPC)5: B41F 7/26 |
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(84) |
Designated Contracting States: |
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DE FR GB |
(30) |
Priority: |
23.12.1988 US 289612
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(71) |
Applicant: HARRIS GRAPHICS CORPORATION |
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Dover
New Hampshire 03820 (US) |
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(72) |
Inventors: |
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- Guaraldi, Glenn Alan
Kingston
New Hampshire 03848 (US)
- Skowron, Michael
Dover
New Hampshire 03824 (US)
|
(74) |
Representative: Stoltenberg, Heinz-Herbert Baldo |
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c/o Heidelberger Druckmaschinen AG
Kurfürsten-Anlage 52-60 D-69115 Heidelberg D-69115 Heidelberg (DE) |
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|
|
(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).
