Патент USA US2129409код для вставки
Sept 6, 1938- A. s. A. DE MELO INKWELL Filed Dec. 30, 1936 2,129,409 2,129,409 Patented Sept. 6, 1938 UNITED STATES PATENT. OFFIQE‘ 2,129,409 INKWELL Alfredo Silveira Avila de vMelo, Lisbon, Portugal Application December 30, 1936, Serial No. 118,420 In Portugal September 2, 1936 5 Claims. (Cl. 120—61) The present invention relates to containers for writing ?uids or the like and particularly to con tainers of the type in which attempt is made to provide a body of writing ?uid of constantv depth 5 for the purpose of insuring the immersion to the same extent of the point of a pen inserted into the container from time to time. The container or, as more commonly expressed, the inkwell, which comprises subject matter of 10 the present invention includes, in addition to the usual receptacle for writing ?uid or the like, a ?oat which normally rests upon the surface of the writing ?uid, the ?oat preferably having su?i cient buoyancy to not only support its own weight 15 but to also support the weight of a pen resting upon the same and the ?oat likewise being so formed as to de?ne a small reservoir or pocket for writing ?uid, quite apart from the main body of writing ?uid in the container, into which the 20 pen may be clipped and in which it will always be submerged to the same extent, regardless of the volume or level of the liquid within the reservoir. The novel inkwell may be designed and con structed for use with pens of various sizes and. 25 Weights, but preferably is designed for use with a pen of de?nite size and weight, which pen is normally positioned with its point resting upon the ?oat within the container but which may be readily withdrawn at any time for writing pur 30 poses. ' The invention not only provides means for en suring that the point of a pen inserted therein shall be immersed only to a predetermined con stant depth, but so functions to render available 35 for use practically every portion of the body of ink placed within the container, and this not withstanding the fact that a very small volume of ink indeed may remain in the container after it has been in use some time Without re?lling, 40 the action of the ?oat being such as to force with in the pen point receiving recess formed therein, and thus render available for use, the last few drops of writing ?uid remaining in the container. the pen while at the same time preventing too deep an immersion of the pen in the writing ?uid. One embodiment of the invention has been selected for disclosure by way of example, and such embodiment is illustrated in the accompany- 5; ing drawing, in which 1 . Figure 1 is an axial section through the con tainer and the enclosed ?oat, a pen being illus trated in the position which it occupies when being inserted; 10 Figure 2 is a similar View but showing the pen fully inserted and the ?oat in lowermost position, with container practically empty of ?uid; Figure 3 is-a section on line 3—3 of Figure 2; Figure 4 is a top view of the container, the pen 15, being omitted in both Figures 3 and 4; and v Figure 5 shows in vertical axial section the cap or closure of the inkwell. The containenas has been previously pointed out, may be formed in various ways, but essen- 20 tially comprises a tubular portion or barrel H], a bottom I I, preferably slightly. conical as shown, and a removable top l2 the lower face of which is also preferably slightly conical, to substantially the same degree as is the bottom. The top I2 is 25 provided with a central aperture l3 for the in sertion of a pen, such as the pen indicated at M, and encircling this aperture and projecting upwardly from the top I2 is a cylindrical ex tension l5 provided interiorly with pen guiding 30 ribs I6 and exteriorly with threads I l for en gagement with the interiorly threaded portion of the top or closure cap 18 which is normally positioned to close the container when not in use. Preferably the container barrel H3 is cylin- 35 drical. Within. the container barrel is a ?oat 20 which may be formed in various Ways and of different materials but in any case is preferably so shaped in horizontal section as to be- substan tially coextensive in area with a horizontal sec- 40 tion through the barrel it, the diameter of the ?oat being only slightly less than the inside di ameter of thebarrel, to prevent binding of the The container and ?oat may be varied widely ?oat within the barrel as it moves vertically with the rise and. fall of the liquid level therein. The 45 in design and appearance, and the invention is likewise not at all limited with respect to the type of pen which may be employed. Thus the pen may be of the fountain pen type or of the ordi 50 nary type without capacity for the storage of cylindrical inner surface of the barrel i0 is pro vided with grooves 2!, or the cylindrical outer surface of the ?oat 20 may be provided with vertical grooves, these grooves providing rela tively restricted ?uid by-pass ducts around the 60 ' 4 ink. The invention is, however, particularly suitable for use in conjunction with pens of the fountain type, the point of any such pen, when inserted Within the container, resting upon the 55 ?oat in such position as to facilitate charging of ?oat 20. . Centrally the ?oat is provided with an aperture or recess 22 which extends entirely through the same from top to bottom thereof and the axis of which is aligned with the axis of the pen guiding 66 2 2,129,409 portion l5 of the container. A pen inserted through the aperture IS in the container top will be guided by ribs l 6 so that its point will enter the vent the too rapid out?ow of ink in the event that the container is overturned, it being possible for recess 22 and the pen l4 illustrated in Figure 2 is shown in this position, with the annular lower end surface 24 of the barrel resting upon an annu through the aperture 22 formed centrally of the ?oat and this ?ow being at a relatively slow rate owing to the fact that it is di?icult for air to ?ow lar shoulder 25 of the ?oat, shoulder 25 encircling the axis of recess 22. Radial grooves 26 maintain the recess 22 in communication with the space the ink to escape only around the ?oat 20 or around the ?oat into the space between the ?oat and the bottom of the container. The ?oat 20 may be fabricated of metal or any 10 above the ?oat, even when the pen is positioned material resistant to writing ?uids or the like and 10 the container itself may be conveniently formed of The upper portion of recess 22 is generally,“ glass or composition. The entire container is in as shown. cylindrical, as shown, and the lower portion is expensive to fabricate and is economical in the use generally conical, terminating in a relatively re of ink when used, the body of ink within the con 15 stricted port 2'! formed in the lower wall or bot tainer having but little surface at any time ex 15 tom of the ?oat. In vertical transverse section posed to the air. When a pen such as indicated therefore the recess 22 corresponds substantially at M is normally left in the position shown, a to the general shape of the pen point 28, su?icient very small evaporation can take place, the lower clearance being provided between the edges of the 7 end of the pen practically sealing off the upper 20 pen point and the inner surfaces of the'walls of end of recess 22. By shaping the bottom of the 20 recess 22 to ensure that the pen point, when at any container as shown, and rendering the bottom of ‘time inserted, will not contact with the walls of the ?oat correspondingly conical, the last remain the recess into which it extends, and quite re ing drops of ?uid will tend to drain toward the gardless of the angular relative relationship of port 21 in ?oat 20 so as to pass readily into recess the pen and ?oat at the time of insertion. The pen point 28 is likewise slightly shorter than recess 22 so that notwithstanding the fact that the ?oat 20 may move downwardly as the ink level falls, to ?nally come to rest upon the bottom of the container, the tip of the pen point cannot at any time strike the container bottom and thereby be injured, the lower end 24 of the pen barrel coming to rest upon the shoulder 25 before the tip of point 28 reaches the lower end of recess 22. The container may be of course ?lled with ink until the upper surface of the ?oat is in contact with the lower surface of the removable top l2. Assuming the ink level to be indicated by the dot 40 and dash line 30, the ?oat 20 will occupy some such position as indicated by the dotted lines 3|, when the pen is at rest upon and is being sup ported by the ?oat. Falling of the ink level has no effect upon the extent of immersion of the ?oat until the ?oat comes to rest upon the bottom of the container. At all times prior to contact of the ?oat with the bottom ll of the container, and when the pen is positioned upon the ?oat, the upper surface of the relatively small body of ink within the recess 22 will be well up toward the top of this recess, for instance at the level indi cated by the dotted line 33 in Figure 2. Even when the ?oat 20 comes to rest upon bottom I I as shown in this ?gure, the level of the ink in recess 22 will at ?rst be at the elevation indicated by the line 33, practically all of the ink in the .container having been forced into recess 22 by the action of the ?oat. Hence it is clear that the ?oat functions as a piston, making available for use practically all of the ink originally placed in the container, an important advantage of the invention. Likewise the rather closely ?tting ?oat 20 functions to pre 22 when the ?oat comes to rest on bottom I l. Having thus described the invention, what is claimed as new and desired to be secured by Let ters Patent is: l. A container for writing or like ?uids com prising a tubular barrel and bottom, and a ?oat in said barrel, the bottom surface of the ?oat being adapted to bear upon substantially the entire area of the bottom of the container when the con tainer is substantially empty, and the ?oat having a pen point receiving aperture therein opening to 35 the bottom of the ?oat into which the last re maining ?uid will be forced by the ?oat when the ?oat reaches its lowermost position. 2. The combination set forth in claim 1 in which the ?oat approximates, in horizontal sec 40 tion, the shape of the inside of the container, and in which vertical grooves are formed in the con tainer barrel for the purpose set forth. 3. A container for writing or like ?uids com prising a tubular barrel and bottom, and a ?oat in said barrel, the bottom surface of said ?oat being adapted to bear upon substantially the entire area of the bottom of the container when the container is substantially empty, said ?oat having a pen point receiving aperture therein opening to the bottom of the ?oat, said aperture having a di ameter insu?icient to receive the barrel of a pen, and being longer than that portion of the pen 50 point which projects from the barrel of the pen. 4. The combination de?ned in claim 3, said tubular barrel having guide means at its top for removably supporting a pen with the axis thereof vertically disposed. 5. The combination de?ned in claim 3, said ?oat being sufficiently buoyant to support the 60 weight of a pen. , ALFREDO SILVEIRA AVILA DE MELO.