Esterbrook Tip Dip Copy?

[TimCasey13]

I have an Esterbrook with a 9xxx nib with what seems to be an ink pathway like the Sheaffer Tip Dip pens. What years would these sort of nibs be from? Are they fairly common?

[Hobiwan]

Picture?

[TimCasey13]

Sure thing! The "pathway" is the pictured v-shaped notch on the underside of the feed.

[Hobiwan]

Thanks, just wanted to be sure. There was another thread that discussed this nib design, but danged if I can find it. Anyway, here is the patent data for it, and when we discussed it, another member pointed out that it could be a Tip-Dip design. Indeed, when I compared it to a Sheaffer Snorkel tube, the description fit. So, Yes, we (at least the ones who looked into it) believe it is a tip-dip design feed.

 

It probably was made late in the game (late '50s or early to mid-'60s). Since Esterbrook had a patent on the design, it differed from the Sheaffer design, while similar in concept: dip only the tip.

 

HTH

 

Logo European Patent Office Espacenet Patent search English
Bibliographic data: GB856881 (A) ― 1960-12-21
Improvements in fountain pens
Page bookmark GB856881 (A) - Improvements in fountain pens
IApplicant(s): ESTERBROOK PEN COMPANY +
Classification: - international: B43K5/18 - Euro: B43K5/18
Application number: GB19570010694 19570402
Priority number(s): USX856881 19560409
Also published as: FR1175445 (A)

Abstract of GB856881 (A)

First page clipping of GB856881 (A)

856,881. Reservoir pens. ESTERBROOK PEN CO. April 2, 1957 [April 9, 1956], No. 10694/57. Class 146(3). A fountain pen comprises a feed-bar having an internal duct wholly within its body extending through its entire length and communicating at one end with the ink reservoir, the duct providing communicating capillary ink and air channels in juxtaposed relation of which the ink channels are located on that side of the air channel nearest the nib, the feed bar also having a transverse slot of capillary dimension underlying the nib and communicating with the capillary ink channels. As shown the feed-bar 10 is formed of extruded plastic material of circular cross-section having an internal duct of U- shaped cross-section which provides a capillary air channel (15b) and ink channels (15a) of slightly greater capillarity. The transverse slot (17) of greater capillarity than the ink channels 15a is cut in the upper part of the feed bar and intersects the ink channels to convey ink therefrom to the underside of the nib. A longitudinal capillary groove 21 is also provided on the upper surface of the feed-bar underlying the forward end of the nib and is intersected by the slot 17. Semi-annular capillary grooves 18 are cut in the underside of the feed-bar to serve as overflow chambers for any excess of ink which has been fed to the underside of the nib through the channels 15a, slot 17 and groove 21. When the pen is inverted the ink in the grooves 18 returns to the reservoir along the feed passages mentioned above. The air channel 15b is blocked in front of the slot 17 by a plug 22 of metal or plastic, air being fed to the channel 15b via the open front ends of the ink channels 15a. In a modification annular capillarygrooves extending completely round the feedbar replace the grooves 18, and the groove 21 extends backwards beyond the front end of the nib-section. A method of making the feed-bar is described wherein a blank of material extruded with the internal duct therein is held horizontally by a member which enters the air channel 15b at the front end of the blank while a notch 30 is cut in the rear end of the blank. The notch 30 is then used to key the blank in a holding fixture while the front end thereof is bevelled and rounded and the grooves 18, 21 and the slot 17 are cut. The nib and feed-bar may be assembled in a sleeve to form a removable insert which is screwed into the nib section.