US 3062420 A
Description (OCR text may contain errors)
Nov. 6, 1962 J. NEUGUT FOUNTAIN GLUE APPLICATOR Filed Dec. 19, 1960 INVEN TOR. JACO B N EUGUT ATT Y United States Patent Ofiice 3,062,420 FOUNTAIN GLUE APPLICATOR Jacob Neugut, 668 Nostrand Ave., New York 16, NY. Filed Dec. 19, 1960, Ser. No. 76,873 2 Claims. (Cl. 222-501) The present invention relates to a glue applicator, and, more particularly, to a fountain glue applicator and especially to a fountain applicator particularly adapted for the spot application of glue or other adhesive or cement.
It is the object of the present invention to provide a fountain applicator for glue or the like, of the character described, which is of highly simplified construction and, therefore, economical to produce.
It is also an object of the present invention to provide a fountain applicator for glue or the like, of the character described, which consists of a minimum of parts that are simple and easy to assemble, thereby further contributing to the economy of production thereof.
It is another object of the present invention to provide a fountain applicator for glue or the like, of the character described, in which the several parts are readily accessible for assembly and replacement, as for cleaning or the like.
It is yet another object of the present invention to provide a fountain applicator for glue or the like, of the character described, in which the resilient means that normally keep the glue outlet valve closed are remote from the glue outlet and disposed at the opposite end of the glue reservoir barrel from the outlet valve end, where it is least likely to interfere with the flow of the glue, and where it is most readily accessible for removal and replacement.
It is a further object of the present invention to provide a fountain glue applicator having improved glue outlet valve characteristics, as well as improved glue flowing characteristics.
It is a still further object of the present invention to provide a fountain glue applicator which is capacious, yet of light weight and compact and may be formed in sufficiently small size for carrying in a pocket.
The foregoing and other objects and advantages of the fountain glue applicator of the present invention will become more readily apparent to those skilled in the art from the embodiment thereof shown in the accompanying drawings, and from the description following. It is to be understood, however, that such embodiment is shown by way of illustration only, to make the principles and practice of the invention more readily comprehensible, and without any intent of limiting the invention to the specific details therein shown.
In the drawings:
FIG. 1 is a vertical, section-a1 view of one embodiment of the fountain glue applicator of the present invention, shown in closed and undispensing position;
FIG. 2 is a fragmentary, vertical, sectional view showing the outlet end of the fountain glue applicator of FIG. 1, in glue-dispensing position;
FIG. 3 is a section taken on line 3-3 of FIG. 1, showing one form of means for the axial alinement of the valve stem of the applicator in the barrel and through its opening, to provide for ready and easy flow through the outlet and for accurate closing of the outlet to prevent leakage; and
FIG. 4 is a foreshortened elevational view of a modified embodiment of valve stem and spring for a glue applicator of the present invention.
Referring now, in greater detail, to the embodiment of the invention illustrated in the drawing, the same is shown to comprise a tubular barrel, generally designated as 16, preferably formed of a synthetic plastic material and preferably formed in two parts, including a relatively 3,052,420 Patented Nov. 6, 1962 longer, lower tubular section, 12, having one end thereof tapering or curving inwardly to form a restricted outlet opening, 14, which may, if desired, be formed with a bevel, 16, at its inner end, to provide a valve seat. The barrel section 12 is provided at its other end with means, as the internal threads, 18, for retaining a closure, such as a second tubular barrel section, 20, which is preferably of lesser length, is closed at one end, and is provided with external threads at its open end, engageable within the threads 18 of the barrel section 12.
To facilitate the turning of the closure barrel section 12, which may sometimes be resisted by the action of an adhesive or glue contained within the barrel, a polygonal flange, 22, is provided adjacent the threaded end of the closure barrel section, 20, to facilitate the application of the force that might be required to loosen the closure from any adhesive, for turning and removal.
While the barrel has been described as consisting of two sections, one longer and one shorter, it may here be stated that it can consist of a single section with a plug closure or more than two sections, and these sections may have varying, relative lengths, as may be desired.
Referring, specifically, to the embodiment of the in vention shown in FIG. 1, there is disposed within the barrel it a rod-shaped stem, 26, which is of lesser length than the barrel interior and which may, likewise, be formed of a synthetic plastic substance. The rod or stem 26 as provided at one end with a pin-like terminal, 28, which is of greater length than the thickness of the barrel section 12 at its outlet end, and of a diameter less than the diameter of the outlet opening 14, and with a valve head, 30, immediately above the pin terminal 28, which is preferably in the shape of a circular flange whose lower surface may be beveled to conform to a bevel at the inner end of the outlet opening 14, so as to form a perfect seal therewith, when it is seated therein.
The applicator of the present invention is also provided with resilient means for normally retaining the valve head 30 in the valve seat 16 which, for the purpose of easy access for insertion and removal, as for cleaning and for minimum interference with the flow of glue at the outlet end, is disposed within the barrel at the opposed end thereof, as within the barrel closure section 20. This comprises a coil spring, generally designated as 32, formed with both of its terminal coils disposed at right angles to the longitudinal axis thereof and with one of the terminal coils, which is disposed to face the interior of the barrel, being spiraled to provide a restricted ring, 34, at the axial center of the spring, which may fit over and receive therewithin the other end portion, 36, of the valve stem 26 and rest against the annular shoulder, 38, formed adjacent said end. It will be understood that the other flattened end of the coil spring will rest against the inner surface of the closed end of the closure barrel section 20, and that the combined normal length of the coil spring 32 and of the portion of the valve stem 26, between its valve head 30 at one end and the shoulder 38 at its other end, is greater than the axial length of the entire barrel 10, so that the coil spring 32 normally urges the valve head 30 into valve seat 16.
In FIG. 4 there is shown a variant of the valve head, valve stem and spring assembly of the present invention. In this embodiment, the valve stem comprises an open ended tubular rod, 40, and the valve head 30 is formed with a short stem, 42, which is inserted into one end of the tubular rod 49, and the coil spring 32 has its inner end coil, 44, curved towards the axial center of the spring and at that point is provided with an inwardly offset projection, 46, that is alined with the longitudinal axis of the spring and engages within the other end of the tubular rod 40.
The manner of assembly and use of the glue applicator of the present invention will be clear from the foregoing description. The valve stem and valve head 30 are inserted into the tubular section 12 with the pin 28 extending from the valve head inserted through the opening 14 of the tubular section 12. The spring 32 is then engaged over the opposed end of the valve stem, either by insertion of the end portion thereof into the restricted ring 34 of the spring, or by insertion of the spring extension 46 into the end of the tubular rod 40, as the case may be, and the cover section 20 or a plug, if such is used, placed over the opposed end of the spring 32 and engaged against the open end of the tubular section 12. When so assembled, the spring 32 will normally urge the valve head 30 into the valve seat 16, to seal the outlet. The glue, or the like, may be inserted into the barrel section 12 at any time after the insertion of the valve stem and head thereinto, and before the closing of the barrel section 12.
To use, the projecting end of the pin 28 is pressed against the surface to which the glue is to be applied, preferably while the glue applicator or dispenser is held in upright position, to push the pin inwardly into the barrel and move the valve head 30 out of the valve seat 16. As the pin is of lesser diameter than the outlet opening, a quantity of glue will flow out therethrough while the pin is in retracted position; the amount of glue depending on the viscosity of the glue and the length of time during which the pin is held retracted into the valve. Release of the applicator from the surface will bring the valve head back into sealing position and the pin into projecting position.
This completes the description of the glue applicator of the present invention and the manner of its assembly and use. It will be readily apparent that the applicator of the present invention possesses improved glue-feeding characteristics in that the resilient means normally resisting outflow of glue and urging the valve head into sealing position is disposed, during the time of the glue application, generally, above and out of the glue, so that its expansion and contraction speed will not be retarded by the viscosity of the glue, to thereby make for a more accurate glue dispensing that can be more easily controlled to dispense lesser quantities of glue at each retraction of the pin.
It will also be apparent that the assembling of the applicator and the filling thereof with glue is easier to accomplish and less messy, by reason of the fact that in assembling and fiilling position the spring is likewise generally disposed above the glue contents of the applicator, so that the spring is drained free of glue and easier and neater to handle. It will be likewise apparent that the applicator of the present invention is of relatively simple construction, of light weight, relatively compact, and easy and economical to produce and assemble.
It will be further apparent that numerous modifications and variations in the fountain glue applicator of the resent invention may be made by anyone skilled in the art, in accordance with the principles of the invention here-inabove set forth, and without the exercise of any inventive ingenuity. I desire, therefore, to be protected for any and all such modifications and variations that may be made within the spirit of the present invention and scope of the claims hereto appended.
What I claim is:
l. A glue applicator of the character described, comprising a tubular glue reservoir closed at both ends, said reservoir comprising a first tubular section open at one end and having a restricted outlet opening formed in its opposed end, and a second section engageable on the free end of and adapted to serve as a closure for said first tubular section, a valve head within said tubular section overlying the marginal edge portion of said outlet opening, said valve head having a pin extension projecting from one side thereof, of lesser diameter than said opening and projecting therethrough to the exterior of the reservoir, and a pin extension on the opposed side of said valve head, a valve stem comprising a tubular rod axially recessed at both ends, said second-named valve pin engaged in the recess at one of said valve stem ends, the other end of said valve stem being of a length terminating short of the other end of said reservoir when said one end thereof is fitted on said valve head pin, and an expanding coil spring interposed between the other end of said valve stem and the adjacent closed end of said reservoir, said spring having its inner coil end bent to the axial center of said spring and being formed with an outwardly offset extension at said axial center, said extension fitting into the recess at said other end of said tubular rod.
2. A glue applicator of the character described, comprising a tubular glue reservoir closed at both ends, said reservoir comprising a first tubular section open at one end and having a restricted outlet opening formed in its opposed end, and a second section engageable on the free end of and adapted to serve as a closure for said first tubular section, a valve head within said tubular section overlying the marginal edge portion of said outlet opening, said valve head having a pin extension projecting from one side thereof, of lesser diameter than said outlet opening and projecting through to the exterior of the reservoir, and a pin extension on its opposed side of said valve head, a valve stem comprising a tubular rod axially recessed at both ends, said second-named valve pin engaged in the recess at one of said valve stem ends, said valve stem being of a length terminating short of the other end of said reservoir when said one end thereof is fitted on said valve head pin, and an expansion coil spring having one terminal coil bent to the axial center thereof and having an outwardly formed extension at said axial center, said spring engaged by its said extension within the recess at the other end of said valve stem, and means in said second reservoir section forming an abutment for the other end of said expansion coil spring.
Australia May 31, 1957 Great Britain Aug. 20, 1925