US2147931A - Method of making inkstands - Google Patents

Description

Feb. 21, 1939. G. J. SENGBUSCH 2,147,931

mmnon OF MAKING vnmsmmms Filed June 12, 1936 g H; I i

4%; w *WM W5 Patented Feb. 21, 1939 .UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a method of making a type of inkstand embodying a large supply of ink, a pen-dipping well fed from the large ink supply and means for holding a pen in such relation to the dipping well that the pen point is in condition for use merely upon removal from the inkstand.

Other objects and advantages will be understood by reference to the following specification lo and accompanying drawing, wherein there is illustrated an inkstand embodying a selected form of the invention.

In the drawing: Fig. 1 is a plan, and Figs. 2 and 3 are sections on the lines 2-2 and 3-3, respectively, of Fig. 1.

Referring now to the drawing, the improved inkstand therein illustrated comprises a receptacle designated 5 in its entirety, the receptacle comprising top, bottom, and side walls, 6, l and 8, respectively. The top wall 6 is provided with a domed portion 9, the purpose of which is to provide an ink supply chamber of large capacity as will presently appear. The said top, bottom and side walls are joined together to form a receptacle to which access'may be had only through a single access opening It] provided in the top 6 near one end of the receptacle. A partition wall H is formed in the receptacleto divide the same into an ink supply chamber [2 and a pen-dipping well I3. An opening or passageway I4 is provided in the lower portion of the partition I I, substantially centrally thereof as clearly shown in Fig. 2. The passageway I4 5 serves to effect communication between the ink supply chamber l2 and the pen-dipping well l3.

The receptacle structure as described is preferably made of a suitable grade of hard rubber which is not affected by the various commercial kinds of ink most commonly used. In producing the device, suitable rubber or other composition is formed into sheets, the sheets being shaped and cut to the size of the various wall portions of the receptacles. Such sheet portions are placed 5 in assembled relation in a suitable mold which embodies the outside shape of the receptacle structure. The composition of rubber material which is adapted to form hard rubber when vulcanized is initially of a medium soft plasticity so that it can be pressed together by hand and caused to fit the inside of a mold such as mentioned. The dome portion 9 of the top member may be substantially pressed to shape in the mold by hand. Thereafter a small quantity of water is placed within the mold and preferably in the preferably drilled through the top wall of the redome-shaped part, the mold being in an inverted position, after which the mold is completely closed and subjected to the required heat for vulcanizing the rubber compound. The heat required converts some of the water into steam which builds 5- up sufficient pressure to force the rubber sheet material into close contact with the walls of the mold so that the shape of the mold is faithfully reproduced on the outside of the receptacle.

When forming the receptacle as described, the 10 partition element is also formed by suitably positioning a partition-forming strip. Such strip is preferably provided with a metallic reinforcing plate l5 which is completely embedded in the rubber material so as to be effectively protected 15 i ceptacle after the receptacle is formed in the manner described. The opening is drilled with its axis at a slight angle to the vertical or so as to receive and position a sleeve element I B in suitable angular position for supporting a pen holder II in predetermined angular position.

The sleeve element It may have an externally tapered lower end portion l8 which is designed to be pressed to a snug fit in the opening Ill. The opening IS in the sleeve may be of substantially cylindrical form throughout the major portion of its length. At the upper end of the sleeve, the opening is, however, flared outwardly as indicated at 20, the upper end of the sleeve being correspondingly flared more or less for appearance purposes.

The pin holder H is provided with a substantially cylindrical lower end portion 2| which is designed to fit in the cylindrical portion IQ of the opening with suflicient tightness to adequately prevent evaporation of ink from the receptacle, but with suflicient looseness to permit the pen to be readily removed from the sleeve IS. The pen is also provided with an enlargement 22 forming a shoulder 23 which is adapted to seat against the flared portion 20 of the opening to limit the extent to which the pen may be inserted in the sleeve. The seating of the shoulder 23 on the sleeve serves, of course, to improve the closing 55 effect of the pen holder in the opening of the sleeve.

As best shown in Fig. 3, the pen point 24 which is carried by the pen holder, is immersed a short distance in the dipping well portion I3 of the inkstand. The depth of ink in the dipping well portion is automatically controlled by height of the passageway 14 through which ink flows from the supply chamber to the clipping well l3. Obviously, the height of the passageway l4 may be made to obtain the desired or most practical depth of ink in the dipping well.

The dipping well I3 is of itself of large area as compared with the area required for receiving the pen supporting structure. By providing such a large area, expansion of ink and air in the supply chamber incident to changes in temperature will not materially affect the depth of ink in the dipping well. By this means the tendency of prior inkstands of the type herein involved to run over in hot weather is effectively eliminated. I

For filling the inkstand, it is most convenient to remove the frictionally held sleeve l6 so as to permit the easy insertion of the spout of a conventional ink bottle. The inkstand may be held with its dipping well portion elevated approximately an inch or so under which condition the ink poured into the dipping well will flow down into the ink supply chamber. If desired, the inkstand may be filled by pouring ink into the dipping well while the stand remains in its normal level condition. When the well is filled, the dipping well portion of the inkstand may be elevated so as to cause the ink in the well portion to flow into the supply or storage chamber, This operation may be repeated a number of times until the desired amount of ink is in the supply chamber.

It will be apparent that the large supply of ink carried by the described structure will last the average user of a device of this type a very long time. It is estimated that in most cases the inkstand will not require refilling more than two or three times in a year.

In some instances it may be preferable to position the passageway I4 nearer one side of the receptacle. A passageway so positioned is indicated by dotted lines at 25 in Fig. 2. By thus positioning the passageway, the possibility of spilling ink by turning the inkstand on its side is materially reduced. If for instance a passageway is so located and the inkstand turned so as to stand on one side, the passageway 25 would, if near the uppermost side, be above the level of ink in the supply chamber so that the ink would be effectively trapped therein and it adjacent the lowermost side, would be so low that the flow of ink would be cut oil by the inability of air to reach the supply chamber to permit the escape of ink therefrom. Such an arrangement does not, however, appear to be of much importance especially when the inkstand is designed to be of the low but wide proportions illustrated. The illustrated proportions of themselves are very effective in preventing upsetting of the device.

The described structure is highly desirable, first, in that it maintains in a conveniently accessible position a pen which is ready for instantaneous writing and the handling of which is not attended with the likelihood of getting ink on the fingers; secondly, in that the device holds a very substantial supply of ink so that the nuisance of frequently filling the ink well is substantially eliminated; thirdly, in that the device is of simple construction, involving no movable or adjustable parts, and iourthly, in that the device is of clean-cut, neat appearance, high durability and low in cost.

Changes in the described construction may be made without departing from the spirit of the invention, the scope of which should be determined by reference to the following claims, the same being construed as broadly as possible consistent with the state of the art.

I claim:

The method of making an inkstand of the class described, which consists in lining a mold with heat curable plastic material, providing a partition element having a passageway therethrough and comprising a reinforcing element wholly embedded in heat curable plastic material, placing said partition element in position within the lined mold, placing a quantity of water in the lined mold, then covering the mold lining with a sheet of heat curable plastic material, closing the mold, and then subjecting the plastic material within the mold to heat for curing and joining the lining elements, partition and covering sheet into an integral hollow structure, the heat employed being sufiicient to convert enough of said water into steam to develop pressure within the structure to press the lining elements and covering sheet into conforming engagement with the walls of the mold, the passageway in said partition permitting intercommunication between the spaces on opposite sides thereof so as to equalize said pressure on opposite sides of the partition, and the reinforcement in said partition element being such as to support the latter against harmful distortion until said curing operation is completed.

GUSTAV J. ,SENGBUSCI-I.

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