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This article was captured from the now-defunct Penbid.com Web site by the Internet Archive WABAC Machine.
Not all of the filling systems tried by Waterman were marketed. The pull filler illustrated here seems to have been an experiment. The design was the work of J. G. Rider who had been a Waterman salesman before starting his own pen making enterprise in Rockford, Illinois.
In this pen the pressure bar lies beneath the sac so that when the knob is pulled up above the barrel the sac is compressed between the inner surface of the barrel and the bar. The knob and pressure bar are of simple design, much cleaner and less protruding than the John Holland saddle style pull filler of this era.
The pen illustrated here is from the Rider estate and the stamp in the center of the barrel is identical to early Rider pens. However, the other stamps on the pen are identical with Waterman pens of the same time frame. The end of the barrel is stamped “12 PSF” standing for Pocket Self Filler, the pen appears to have been made by Waterman to Mr. Rider’s specifications.
The filling system seems simple, straightforward and to work well. One can only speculate why Waterman did not adopt this filler. Perhaps Mr. Rider’s price was too high or perhaps there were Patent problems (but my research has disclosed not Patent application for any similar filling system nor any applications on behalf of either Rider or Waterman for this design). Mr. Rider continued to work on the pull filler and made several other prototypes but never marketed a pull filler under his own name either.