tag:blogger.com,1999:blog-2000975408141883421.post4357695888419643426..comments2024-03-28T09:13:39.913-04:00Comments on Vintage Pen News: Mystery pen: Parker pneumatic-fillerUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2000975408141883421.post-26032420260613621722019-09-30T09:23:47.447-04:002019-09-30T09:23:47.447-04:00Reading Moore's patent, which was assigned to ...Reading Moore's patent, which was assigned to Parker, I noticed that the design is based on a porous packing used to seal the space between the plunger tube and the pen barrel. According to the description, it allows for air pressure to return to atmospheric pressure after pulling the plunger and a fast push of the plunger would then collapse it again allowing permeability to equalize the VictorShttps://www.blogger.com/profile/12221195009709438021noreply@blogger.comtag:blogger.com,1999:blog-2000975408141883421.post-3834145707868120342015-07-21T03:40:59.578-04:002015-07-21T03:40:59.578-04:00Thanks for the info, David. I've added it to ...Thanks for the info, David. I've added it to the "Parker Model Numbers" list in my blog.George Kovalenkohttps://www.blogger.com/profile/01438655860118665751noreply@blogger.com