Патент USA US2403703код для вставки
July 9, 1946., ‘ v ‘ R, BACK ‘ ~ . 2,403,703v ' HOODED ‘FEED BAR FOR PENS‘ Filed Aug. 27», 1945 E0552 7'' BAINc/<. VEN TOR. BY ' ' ATTORNEY. 2,403,703 Patented July 9, 1946 ~ Y UNITED‘ STATES I‘V'PATENV‘T "osrics HOODED FEED BAR FOR PENS Robert Back, Los Angeles', Calif., assignor to Bert M. Morris C0,, Los Angeles, Calif., a ?rm - ' 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 cooper ating 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 pre (Cl. 120-51) 2 , 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 longi , tudinally extending at the bottom of the feed bar, is a web 10 having sides which are substan tially 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 vent the pen from flooding. . . These objects are accomplished by employing ~10 bar in ‘the mold section in which it is cast, as described and claimed in the following patent a feed bar having on its underside. a longitudi applications: Ser. No; 612,820, ?led August 2'1, nally extending web and by arranging a slot in ‘ 1945, for “Feed bar for pens,” and Ser. No. 612,821, the bottom of .the hood to guide and properly ?led August 27, 1945, for “Method of molding position the feed bar in the hood when the parts are assembled. Also, the web on the feed bar 15 feed bars for pens.” If the undercut is used, the thermo-plastic material customarily employed for and the slot in the hood cooperate to provide cap making feed bars is deformable enough when the illary spaces which assist in holding ink in the mold is opened to permit the usual ejection pins hood and on the feed bar, these capillary spaces to eject the feed bar. This insures that the . also serving as openings to permit the escape of air at the rear of the pen assembly to prevent 20 upper mold section will pull away from all of the - combs and prevent distortion of the molded arti such air from producinga ?ood of ink at the tip cle which would arise if some of the combs stuck end of" the pen assembly, in the upper mold section and others stuck in The presence of such air may ‘be due to the the lower mold section. . I expansion of entrapped air due to the heat from The bottom ll of the hood inclines upwardly the hand or body of the user or atmosphere, in 25 towards the front of the hood as shown in Fig. the case of either a dip pen or a fountain pen. 3. At the front end of the hood bottom ll is a ’ For further details of the invention, reference slot I2 through which the web l0 projects in may be made to the drawing wherein the ?nished article, as shown in Fig. 3. Slot l2 Fig. 1 is an enlarged view in side elevation of has sides 13 and M which are substantially par a hooded type pen according. to the present in allel and spaced apart slightly more than the vention. width of the substantially parallel sides of Web Fig. 2 is an exploded view in full size showing ID, thereby providing capillary spaces l5 and I6 in side elevation the nib, feed bar and hood of between each side of the web l0 and the adjacent the present invention. side of the slot l2. Fig. 3 is an enlarged view in side elevation When the feed bar 3 is assembled in the hood with the hood in section, of the pen assembly of 2, the web l0 slides in and through the slot l2 Fig. 1. ‘ to guide the feed bar into the hood so that the Fig. 4 is an enlarged bottom plan view of the feed bar will not be ‘in a rotated position with pen assembly of Fig. 1 as seen on line 4-4 of respect to the hood but will be properly aligned 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 ?t 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 therewith, as shown in Figs. 3 to 5. When in position, the ‘web 10 at its front end extends through slot 12 top 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 longi tudinally 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 com municate 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 end of the feed bar project. The feed bar 3 at opposite sides thereof has 55 reason at the rear end of the feed bar would 2,403,703 4 cause the ink to ?ood. 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 ?lm of ink may exist at those openings, the air pressure would have less work to do in breaking those ?lms 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 open ings I5 and I6 which serve as a capillary force to retain ink in the hood 2. ' 1. A pen assembly comprising a hood having a socket, a feed bar ?tting in said socket, a longi tudinally extending web at the bottom of said feed bar, said hood having a bottom having a slot slightly wider than .said. Web, said web ex tending through said slot, said slot opening into the interior of said hood on its inside and open ing at the exterior of said hood at its outside and providing capillary spaces at opposite sides of 10 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 It will be apparent that various. modi?cations 15 said axis, said web extending through said slot may be made in the invention without departing to the inside and outside of the bottom of said from the spirit of the following claims. hood. I claim: ROBERT BACK.