March 11, 1969
`
`T. L. KALTENBACH
`SEAL SPRAY GUN SIPHON CUP
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`Filed March 23, 196'?
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`3,432,104
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`INVENTOR
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`Saint-Gobain
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`Exhibit1019
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`Page1
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`Saint-Gobain Exhibit 1019 Page 1
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`United States Patent Office
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`3,432,104
`Patented Mar. 11, 1969
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` 1
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`2
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`3,432,104
`SEAL SPRAY GUN SIPHON CUP
`Theodore L. Kaltenbach, Mequon, Wis.
`(1475 Wadsworth Drive, Florissant, Mo.
`63031)
`Filed Mar. 23, 1967, Ser. No. 642,267
`US. Cl. 239—328
`Int. Cl. B051) 11/00
`
`
`10 Claims
`
`ABSTRACT OF THE DISCLOSURE
`
`Apparatus for spraying paint or other liquids, and par~
`ticularly to a siphon or gravity cut structure, which must
`be secured to a spray gun equipped with siphon nozzles.
`The cup assembly can be secured to the spray gun by
`either a swivel nut, quick detachable fluid connection or
`in some cases, by a length of fluid hose with connections.
`This invention is dependent on a spray gun to siphon
`paint or other liquids from the cup assembly and also
`to form a seal at the fluid nozzle and needle seats when
`the trigger is released on the gun.
`‘
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`5
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`10
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`20
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`35
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`40
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`All present siphon cups in use require a vent open-
`ing located in the cover to allow atmospheric pressure
`to come in direct contact with the liquid so that the spray
`gun can siphon liquid from the cup container. This type;
`of vent feature can be a cause of paint leakage, which“
`can damage a painted surface. If also allows ambient air
`to enter the cup, and can cause the paint to lose solvent
`vapors, and can cause drying of the paint. If the vent be-
`comes plugged,
`the liquid or paint cannot be siphoned
`from the cup. By using a spray gun with an old-style
`vented cup,
`the Operator is limited to how full he fills
`the cup, and also, what angle he holds and moves the gun.
`It is a primary object of this invention, to provide a
`siphon cup or gravity cup which will eliminate the prob-
`lems mentioned in the previous paragraph, and also have
`other advantages which will be explained or apparent in
`the continuing description.
`is to provide
`Another prime object of this invention,
`a siphon or gravity cup that does not have a vent in the
`cover assembly.
`A further object is the provision of a siphon cup at-
`tached to a spray gun and having a disposable portion
`wherein said disposable portion may be inserted in the
`dry-vented cup container in such a manner as to render
`the entire device, clean, leakproof, freely maneuverable,
`rugged, strong, storable and capable of quick assembly
`and disassembly.
`Another object is to provide a siphon cup that com-
`pletely seals the paint or liquid from direct contact with
`dust laden ambient air. This feature allows paint to be
`stored in the cup without danger of the paint drying, or
`the viscosity changing due to loss of solvent vapors.
`An important object of this invention is to provide a
`siphon cup, in which paint or liquid can be agitated by
`shaking the entire device without paint leakage or spill—
`ing. This feature is important when spraying acrylic fin—
`ishes, metallic finishes and primer surfacers.
`Yet another object is to provide a cup, which, when
`attached to a spray gun, allows the operator to freely
`move the entire device in any position without danger of
`leakage.
`A main object of this invention is to provide a siphon
`cup, with a disposable liner, that can be quickly cleaned
`for rapid color changes.
`if a quick detachable fluid
`It should be noted that
`connection is incorporated with the siphon cup, the cup
`would be completely sealed without the aid of ’a spray
`gun.
`
`60
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`65
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`FIGURE 1
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`is a side, cutaway, sectional View of a
`
`clamp type siphon cup, incorporating the present inven-
`tion secured to a spray gun and ready for use.
`FIGURE 2 is a perspective view of a partially opened
`liner or bag utilized as a collapsible container in this in-
`vention.
`
`FIGURE 3 is a side, cutaway, sectional view of a screw-
`type siphon cup incorporating the present invention. Note
`that this structure does not require a siphon tube, ren-
`dering it both a siphon and gravity cup.
`FIGURE 4 is a side, cutaway, sectional view of a screw-
`type siphon cup incorporating the present invention.
`Referring now to FIGURE 1, there is shown a spray
`gun 10, complete with air and fluid nozzle assembly 11,
`and trigger 12, which when actuated allows compressed
`air to enter spray gun at air connection 13. The com-
`pressed air flows through the spray gun 10, and is caused
`to flow through the nozzle assembly 11, which induces
`flow of liquid from the cup assembly. The spray gun 10
`is secured to the cup assembly by a swivel nut 14. It
`should be noted that a quick detachable connection could
`be used in place of the swivel nut 14.
`The cup assembly consists of swivel nut 14, attached
`to the fluid conduit assembly 21, which extends from
`the spray gun through the nonvented cover 17 to the bot-
`tom of the cup. The cover 17 and the fluid conduit as—
`sembly 21 are secured and sealed by a gasket and lock
`nut (not shown).
`The dry-vented cup structure 19 forms a container and
`support for the disposable liner 20‘. The cup structure 19
`has a circular opening at the top plus one or more vent
`openings 22 to allow atmospheric pressure to enter and
`contact the outer surface of liner 20‘. At the upper open
`end of the liner 20, are oppositely directed openings 24.
`When‘the liner 20 is placed within cup 19, the open top
`of the liner 20 is turned back over the rim of the cup
`19 and the openings 24 are slipped over the hollow pins
`23, which are firmly attached to cup 19 and also act as
`vents.
`
`The U-shaped yoke 15 pulls the cup 19 and the liner
`20 into engagement with a sealing gasket 18 mounted on
`the underside of cover 17. The center port of the yoke
`is smooth, which allows it to move freely upwardly or
`downwardly.
`By moving the yoke 15 upwardly of the cover 17, the
`hooked ends of the yoke 15 pull the hollow pins 23 to—
`ward the cover 17,
`thus the entire cup structure is as-
`sembled and the liquid 26 is sealed from ambient air. The
`yoke 15 is locked in this upwardly position by lever 16
`which has a threaded center port. As the threaded lever
`16 is rotated upon the threaded portion of fluid conduit
`assembly 21, the yoke 15 can be raised or lowered de-
`pending on the direction lever 16 is rotated.
`Atmospheric pressure enters cup 19 through vent open-
`ing 22 or hollow pins 23 and allows the spray gun 10 to
`siphon liquid from the sealed liner 20.
`Referring to FIGURE 2, there is shown, the liner 20*
`with the bottom end sealed at 25‘ to form a container. The
`upper end of the liner is open. Also shown are oppositely
`directed openings 24. The liner 20 is preferably con-
`structed of a flexible plastic film material so as to render
`the liner liquid-tight, flexible, strong and resistant to paint
`finishes and solvents. The sides of the liner are pleated
`to allow the liner to expand when filled with liquid.
`Referring to FIGURE 3, there is shown a screw-type
`cup structure consisting of a swivel nut 14 and a tail-
`piece 27, which is threadedly secured to a nonvented
`cover 28‘. The fluid conduit extends from the spray gun
`to the underside of cover 28. The cover 28 has internal
`screw threads 29 to accommodate the cup structure 30'.
`The dry-vented cup structure 30‘ forms a container and
`support for the disposable liner 20. The lip of cup 30
`is circular in cross section and is provided with a screw
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`Saint-Gobain
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`Exhibit 1019
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`Page 2
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`Saint-Gobain Exhibit 1019 Page 2
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`3,432,104
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`3
`thread 31 on its outside. The cup 30 has a circular opening
`at the top, plus one or more vent openings 22. The liner
`20 is placed within cup 30 and the open top of the liner
`is turned back over the top rim of cup 30. The turned-back
`edge of the liner 20 can be further secured to the cup
`30 by means of pressure sensitive adhesive preapplied to
`the upper outer edge of liner 20. It also can be held in
`place by using masking tape. The adhesive and the mask-
`ing tape are not shown in the drawing, as they are not
`normally needed.
`Thread 29 in cover 28 coacts with cup thread 31 to
`engage cup 30 and liner 2.0 with gasket 18, and to seal
`and render the entire cup structure ready for use.
`The liquid 26, when siphoned from the liner 20, must
`flow through filter screen 32 before entering the fluid
`conduit and the spray gun.
`The function of the structure shown in FIGURE 3 is
`the same as that shown in FIGURE 1.
`Referring to FIGURE 4, there is shown a screw—type
`cup structure, which is basically the same as the structure
`in FIGURE 3, with the exception that a fluid tube 33
`extends to the bottom of the liner 20.
`The function of the structure shown in FIGURE 4 is
`the same as that shown in FIGURES 1 and 3.
`While a preferred embodiment of the invention has
`been shOWn and described, it is obvious that many other
`modifications could be made by one skilled in the art,
`without departing from the spirit of the invention. It is
`intended to protect by Letters Patent all forms of the
`invention falling within the scope of the following claims.
`I claim:
`1. In a spray gun siphon cup, the combination of:
`a removable clamp type cover attachment, said attach—
`ment to be free of any vent openings, a fluid dis-
`charge conduit having a notched inner end and an
`outer end attached to a spray gun for subjecting
`the discharge conduit to a partial vacuum for draw-
`ing material through the discharge conduit, said cover
`attachment having a sealing gasket located on the
`underside of said cover, said attachment to have a
`lever actuated yoke with hooked ends;
`a cup shell having one or more vent openings in un—
`interrupted communication with the inside of the
`shell, plus an opening at its top, said cup shell having
`opposed pins coacting with hooked ends of said
`lever actuated yoke; and
`a sack-like inner liner, having opposed pleated sides,
`partially disposed within said cup shell and having
`its top end extending overly, outwardly and down-
`wardly around said shell rim, said liner having op-
`posed openings at its top end to engage with the
`pins on said cup shell, said liner top end to be sealed
`between cover sealing gasket and cup shell rim when
`said yoke hooked ends coact with pins on said cup
`shell.
`2. The combination of claim 1 wherein said fluid con-
`duit further includes at its outer end a fluid quick detach-
`able connection between spray gun and said fluid conduit.
`3. In a spray gun siphon cup, the combination of:
`a removable screw-type cover attachment, said attach-
`ment to be free of any vent openings, a fluid dis-
`charge conduit having an inner end located adjacent
`the underside surface of said cover and an outer end
`attached to a spray gun for subjecting the discharge
`conduit to a partial vacuum for drawing material
`through the discharge conduit, said cover attachment
`having a sealing gasket located on the underside of
`said cover, said cover having interior threads and
`said cover having a filter screen located at inner end
`of fluid conduit;
`a cup shell having one or more vent openings in un-
`interrupted communication with the inside of the
`shell, plus an opening at its top and having interior
`threads near said top releasably mated with the
`threads on said cover; and
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`10
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`20
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`25
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`30
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`CO CR
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`a sack-like inner liner, having opposed pleated sides,
`partially disposed within said cup shell and having
`its t0p end extending overly, outwardly and down-
`wardly around said shell top and having a portion of
`said liner disposed between the threads of said cup
`shell and said cover when said threads are mated,
`said mating of said threads seals liner between cup
`shell rim and sealing gasket in said cover.
`4. In a spray gun siphon cup, the combination of:
`a removable screw-type cover attachment, said attach-
`ment to be free of any vent openings, a fluid dis-
`charge conduit having an inner end located adjacent
`the underside surface of said cover and an outer end
`attached to a spray gun for subjecting the discharge
`conduit
`to a partial vacuum for drawing material
`through the discharge conduit, said cover attachment
`having a sealing gasket located on the underside of
`said cover, said cover having interior threads and said
`cover having a filter screen located at inner end of
`fluid conduit;
`a cup shell having one or more vent openings in un—
`interrupted communication with the inside of the
`shell, plus an opening at its top, and having exterior
`threads near said top, releasably mated with the
`threads on said cover; and
`a sack-like inner liner, having opposed pleated sides,
`said liner having pressure sensitive adhesive on its
`exterior open end edge area to secure liner to upper
`exterior end of said cup shell, said liner partially
`disposed within said cup shell and having its top end
`extending overly, outwardly and downwardly around
`said shell top and having a portion of said liner dis-
`posed between the threads of said cup shell and said
`cover when said threads are mated, said mating of
`said threads seals liner between cup shell rim and
`sealing gasket in said cover.
`5. The combination of claim 4 wherein said fluid c011—
`duit further includes at its outer end a fluid quick detach-
`able connection between spray gun and said fluid conduit.
`‘6. In a spray gun siphon cup, the combination of:
`a removable screw-type cover attachment, said attach-
`ment to be free of any vent openings, a fluid dis—
`charge conduit having a notched inner end and an
`outer end attached to a spray gun for subjecting the
`discharge conduit to a partial vacuum for drawing
`material through the discharge conduit, said cover
`attachment having a sealing gasket located on the
`underside of said cover and said cover having interior
`threads;
`a cup shell having one or more vent openings in un—
`interrupted communication with the inside of the
`shell, plus an opening at its top and having exterior
`threads near said top releasably mated with the
`threads on said cover; and
`a sack-like inner liner, having opposed pleated sides,
`partially disposed within said cup shell and having
`its top end extending overly, outwardly and down-
`wardly around said shell top and having a portion of
`said liner disposed between the threads of said cup
`shell and said cover when said threads are mated,
`said mating of said threads seals liner between cup
`shell rim and sealing gasket in said cover.
`7. In a spray gun siphon cup, the combination of:
`a removable screw-type cover attachment, said attach-
`ment to be free of any vent openings, a fluid dis-
`charge conduit having a notched inner end and an
`outer end attached to a spray gun for subjecting the
`discharge conduit to a partial vacuum for drawing
`material through the discharge conduit, said cover
`attachment having a sealing gasket located on the
`underside of said cover, and said cover having in-
`terior threads;
`a cup shell having One or more vent openings in un-
`interrupted communication with the inside of the
`shell, plus an opening at its top and having exterior
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`Saint-Gobain
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`Exhibit1019
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`Page3
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`Saint-Gobain Exhibit 1019 Page 3
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`3,432,104
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`5
`threads near said t0p releasably mated with the
`threads on said cover; and
`a sack-like inner liner having opposed pleated sides,
`said liner having pressure sensitive adhesive on its
`exterior open end edge area to secure liner to upper
`exterior and of said cup shell, said liner partially
`disposed within said cup shell and having its top end
`extending overly, outwardly and downwardly around
`said shell top and having a portion of said liner dis-
`posed between threads of said cup shell and said
`cover when said threads are mated, said mating of
`said threads seals liner between cup shell rim and
`sealing gasket in said cover.
`8. The combination of claim 7 wherein said fluid con~
`duit further includes at its outer end a fluid quick detach-
`able connection between spray gun and said fluid conduit.
`9. In a paint spray gun siphon cup assembly com-
`prising:
`a container unit including a cup—like shell member
`having at
`least one vent opening providing unin-
`terrupted communication with the inside of the shell
`and the exterior of the shell and having a removable
`top cover member providing a continuous sealing
`surface, said container unit including member means
`to releasably secure the cover member to the shell,
`21 fluid discharge conduit means secured to the cover
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`6
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`and extending inwardly into the cup shell and having
`input means for subjecting the discharge conduit to
`a partial vacuum thereby drawing liquid upwardly
`from the cup through the discharge conduit,
`a replaceable sack-like inner liner releasably secured
`within the container unit and extending about the
`open end of the cup shell to completely enclose the
`interior of the cup shell and to support the paint
`within the cup shell for discharge through said dis—
`charge conduit, said liner in combination with said
`cover essentially completely sealing the paint from
`the exterior atmosphere.
`10. The spray gun siphon cup apparatus of claim 9
`wherein said discharge conduit means extends downwardly
`essentially to the lower innermost end of the sack—like
`inner liner and includes a lower notched end.
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`References Cited
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`UNITED STATES PATENTS
`
`2,177,0‘32
`3,198,438
`3,201,047
`3,255,972
`
`10/1939 Baumgardner ______ 239—328 X
`8/1965 Hultgren ________ 239—-—328 X
`8/1965 Danberg __________ 239‘——328 X
`6/1966 Hultgren et al. ____ 239—328 X
`
`ALLEN N. KNOWLES, Primary Examiner.
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`10
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`20
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`25
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`Saint-Gobain
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`Exhibit1019
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`Page4
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`Saint-Gobain Exhibit 1019 Page 4
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