Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hp-vcd!neff
From: neff@hp-vcd.HP.COM (Dave Neff)
Newsgroups: comp.sys.mac.hardware
Subject: Re: HP DeskWriter problem.
Message-ID: <1170033@hp-vcd.HP.COM>
Date: 24 May 91 23:33:44 GMT
References: <42398@cup.portal.com>
Organization: Hewlett Packard, Vancouver, WA
Lines: 23

>Sometimes the print head nozzles get a bit clogged with dried ink.  A
>few quick wipes with a Kleenex usually will fix the problem.
>Sometimes you have to poke on the back of the ink bladder with a sharp
>object (CAREFULLY! so as to not puncture the bladder) to force a bit
>of ink through the nozzles before wiping it.  A small hole is provided
>on the back of the cartridge for doing this.
>
>This procedure should be described in your owners manual.  I carried
>over my experience with ThinkJets...
>
>===============================================================================
>Steve Witten                    stevewi%hpspdra@hplabs.hp.com

Strange, the DeskJet pens don't have a bladder (the ThinkJet pens did).
The DeskJet pens have foam to supply the back pressure.  Poking a sharp
object into the hole can't puncture the bladder since there isn't one
but it could force a bit of ink out the nozzles anyway due to the pressure
on the foam.  Its easier just to blow in the hole if you need to force
some ink through.  Usually blowing on the hole and then using kleenex
on the pen clears up any problem priming wont.

Dave Neff
neff@hpvcfs1.HP.COM