Paterson Auto Print Washer

Discussion in 'Darkroom Equipment' started by gliderbee, Jan 25, 2014.

  1. gliderbee

    gliderbee Member

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    I just received one of these, used, for a good price, but there's no manual with it, and I have no idea how to install the "plunger" or whatever that thing is that regulates the water-inlet. Is there anybody who can make a scan of the manual and mail it to me ? Or can I find it anywhere on the net (no luck with google ..) ?

    Thanks,
    Stefan.
     
  2. AgX

    AgX Member

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    I never Held one in my Hands, but:

    That container with racks holding the paper has got two tube connections.
    One at the top, the other (via an upgoing tube) at the bottom.
    The water loaded with salts will sink down, thus one will have one downward stream.

    If you let in fresh water at the top you can let out the heavy, salts loaded water from the ground.
    However this has some similarities with the "concurrent flow" principle"

    Doing it the contrary way let's one think of the more effective "countercurrent flow" principle


    EDIT:
    I realized that there are two versions.
    The current one with that large protrusion at the top of the tank seemingly has in- and outlet connections at that protrusion and uses a bubble agitation system like the one in the Jobo Cascade. There seems to be an inside tube going down to the bottom too.

    The older version has a straight tank and an outside tube running down the wall.
     
    Last edited by a moderator: Jan 25, 2014
  3. gliderbee

    gliderbee Member

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    Well, I think I have the newer version then: mine indeed has in- and outlet at the top. My problem is how to install that plunger system; I can fix it with the white plastic screw at the outside, but the diameter of the "incoming" hose is too large (although it is the original one), so I don't understand how that should be fixed on the plunger system at the inlet outside of the tank.

    Stefan.
     
  4. gliderbee

    gliderbee Member

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    It's indeed exactly the same I have. The incoming tube in your picture, is it just a press-fit over the plunger, or is it held in place by the white plastic screw ?

    Thanks,
    Stefan.

     
  5. ac12

    ac12 Member

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    I replaced my input hose with a clear plastic tube and put a hose clamp on the end to secure the tube to the washer.
     
  6. mcd

    mcd Member

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    The small movable part goes toward the inside, where water flow pushes it outward to rock the print rack. The weight of the rack presses it closed and then the water pressure builds up and moves the piston out and moves rack. It's like a perpetual motion machine as long as the water is turned on to the proper flow, which is much less than you would think initially. The Grey water exit area drains fixer-laden water off the bottom and then up to the top of the washer and out.
     
  7. AgX

    AgX Member

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    So there is actually a piston inside.
    To me it looked like that air-inlet at the Jobo Cascade, but I wondered about that metal part that connects the rack assembly with that cylinder.
    And it works in counterflow as I expected.