US2403703A - Hooded feed bar for pens - Google Patents

Description

July 9, 1946. CK 2,403,703v

v HOODED FEED BAR FOR PENS Filed Aug. 27, 1945 E0552 7' BA c/ IN VEN TOR.-

' ATTORNEY.

Patented July 9, 1946 HOODED FEED BAR FOR PENS Robert Back, Los Angeles Calif., assignor to Bert M. Morris C0,, Los Angeles, Calif., a firm Application August 27, 1945, Serial No. 612,819

2 Claims. 1

The invention relates to a hooded type feed bar for pens and more particularly to a cooperating hood and feed bar for writing pens.

Objects of the invention are to facilitate proper alignment of the feed bar in the hood, to increase the capacity of the hood andfeed bar to retain ink, and to provide a combined feed bar and hood having an opening for the escape of air to prevent the pen from flooding.

These objects are accomplished by employing a feed bar having on its underside. a longitudinally extending web and by arranging a slot in the bottom of .the hood to guide and properly position the feed bar in the hood when the parts are assembled. Also, the web on the feed bar and the slot in the hood cooperate to provide capillary spaces which assist in holding ink in the hood and on the feed bar, these capillary spaces also serving as openings to permit the escape of air at the rear of the pen assembly to prevent such air from producinga flood of ink at the tip end of" the pen assembly,

The presence of such air may be due to the expansion of entrapped air due to the heat from the hand or body of the user or atmosphere, in the case of either a dip pen or a fountain pen.

For further details of the invention, reference may be made to the drawing wherein Fig. 1 is an enlarged view in side elevation of a hooded type pen according. to the present invention.

Fig. 2 is an exploded view in full size showing in side elevation the nib, feed bar and hood of the present invention.

Fig. 3 is an enlarged view in side elevation with the hood in section, of the pen assembly of Fig. 1.

Fig. 4 is an enlarged bottom plan view of the pen assembly of Fig. 1 as seen on line 4-4 of Fig. 1 looking in the direction of the arrows.

Fig. 5 is a sectional view on line 5-5 of Fig. 3 looking in the direction of the arrows.

Referring in detail to the drawing, the pen assembly 1 comprises a hood 2 forming a socket for a feed bar 3, and a suitable nib 4.

The pen assembly I is here shown as having a closed cylindrical end 5 to fit in the socket, not

- shown, for a dip rpen, although the invention herein described may be employed for a, fountain pen.

The hood 2 completely encircles the rear end and most of the feed bar 3. Hood 2 has an open front end 6 through which the nib and the front end of the feed bar project.

The feed bar 3 at opposite sides thereof has a full-fashioned comb 1 and 8, the bottoms of which terminate slightly belowthe axis of the feed bar as indicated by the line 9 in Fig, 3. Below the bottom of the comb land 8 and longitudinally extending at the bottom of the feed bar, is a web 10 having sides which are substantially parallel or which may converge inwardly in an upward direction by a slight angle such as 1/2 to temporarily retain the lower half of feed bar in the mold section in which it is cast, as described and claimed in the following patent applications: Ser. No; 612,820, filed August 2'1,

1945, for Feed bar for pens, and Ser. No. 612,821,

filed August 27, 1945, for Method of molding feed bars for pens. If the undercut is used, the thermo-plastic material customarily employed for making feed bars is deformable enough when the mold is opened to permit the usual ejection pins to eject the feed bar. This insures that the upper mold section will pull away from all of the combs and prevent distortion of the molded article which would arise if some of the combs stuck in the upper mold section and others stuck in the lower mold section. I

The bottom ll of the hood inclines upwardly towards the front of the hood as shown in Fig. At the front end of the hood bottom ll is a slot I2 through which the web l0 projects in the finished article, as shown in Fig. 3. Slot l2 has sides 13 and M which are substantially parallel and spaced apart slightly more than the width of the substantially parallel sides of Web ID, thereby providing capillary spaces l5 and I6 between each side of the web l0 and the adjacent side of the slot l2.

When the feed bar 3 is assembled in the hood 2, the web l0 slides in and through the slot l2 to guide the feed bar into the hood so that the feed bar will not be in a rotated position with respect to the hood but will be properly aligned therewith, as shown in Figs. 3 to 5. When in position, the web 10 at its front end extends through slot 12 to the outside of hood 2 and web It! at its rear end extends through slot l2 to the inside of hood 2.

The feed bar 3 at the top thereof has a longitudinally extending capillary channel I! and the rear end of the feed bar may be cut away, as shown at l8, so that channel I! may communicate with a chamber l 9 in the case of a dip pen, or with the reservoir of the fountain pen, not shown.

If the hood is loaded with ink, in the absence of slot l2, an increase in air pressure for any reason at the rear end of the feed bar would cause the ink to flood. from the front end of the feed bar. This is avoided or reduced according to the present invention, as such increase in air pressure is relieved through the openings l5 and It; for the reason that while a, capillary film of ink may exist at those openings, the air pressure would have less work to do in breaking those films and escaping through openings l5 and I6 than it would in pushing a body of ink beyond the front end of the feed bar.

The sides of the web l0 and the sides of the slot 12 cooperate to provide the capillary openings I5 and I6 which serve as a capillary force to retain ink in the hood 2.

It will be apparent that various modificationsmay be made in the invention without departing from the spirit of the following claims.

I claim:

1. A pen assembly comprising a hood having a socket, a feed bar fitting in said socket, a longitudinally extending web at the bottom of said feed bar, said hood having a bottom having a slot slightly wider than .said. Web, said web extending through said slot, said slot opening into the interior of said hood on its inside and opening at the exterior of said hood at its outside and providing capillary spaces at opposite sides of said web.

2. A pen assembly according to claim 1 wherein the bottom of said web is substantially .parallel to the axis of said feed bar and the bottom of said hood and also said slot are inclined to said axis, said web extending through said slot to the inside and outside of the bottom of said hood.

ROBERT BACK.

Images