With Feeder And Additional Flow Modifier Or Retarder At Foot Of Fill Tube Patents (Class 141/255)
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Patent number: 10647562Abstract: A filling valve includes a valve seat, an axially-movable valve tappet extending through the valve seat and having an axial portion that defines a product-delivery space through which filling product flows, and axially-displaced first and second seal-seats disposed so that liquid product flows from the first seal-set, through the product-delivery space, to the second seal-seat and out through an outlet. The first seal-seat and the second seal-seat are arranged on the valve tappet in such a way that, in response to a closing movement of the valve tappet, the first seal-seat closes before the second seal-seat, and wherein the first seal-seat, after having been closed as a result of the closing movement, permits further axial movement of the valve tappet to permit closing of the second seal-seat.Type: GrantFiled: September 17, 2015Date of Patent: May 12, 2020Assignee: KHS GmbHInventors: Ludwig Clüsserath, Max Stolz, Manfred Härtel, Dieter-Rudolf Krulitsch
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Patent number: 10118188Abstract: A drive rod in a solid material dispenser is linearly movable along, and rotationally movable around, an axis direction. A central rod is attached to the drive rod and drivable by the drive rod to rotate around the axis direction with the drive rod. A solid material container has one or more compartments to store solid materials to be dispensed. A switch valve is rigidly attached to the central rod and drivable by the central rod to rotate around the axis direction with the central rod. A container bottom of the solid material container comprises one or more first component shapes that form one or more first interstitial void spaces. The switch valve comprises one or more second component shapes that form one or more second interstitial void spaces.Type: GrantFiled: August 24, 2015Date of Patent: November 6, 2018Assignee: Eutomation, Inc.Inventors: Xuejun Wang, Xinhua Zong
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Patent number: 8857675Abstract: The invention relates to a device (10) for the metered filling of bulk material having a metering screw (16), which is arranged in a hollow cylinder shaped metering tube (12) and which can be slid in a longitudinal axis (L) of the metering tube (12), having a closing head (18) for closing a metering opening (14), wherein the closing head (18) has a substantially conical surface (20) and the metering tube (12) transitions after the metering opening (14) into a hollow cylinder shaped mouthpiece (32) having a larger inner diameter (DMi) compared to the inner diameter (dRi) of the metering tube (12).Type: GrantFiled: September 28, 2010Date of Patent: October 14, 2014Assignee: Robert Bosch GmbHInventors: Markus Gysel, Hansruedi Frueh, Tobias Bury
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Patent number: 8490659Abstract: A filling apparatus of flexible containers with a dense fluid, such as cream, yoghurt, honey, fruit juice, medicines and similar comprises vacuum devices, gas supply devices, filling devices and a valve. The valve comprises a main body, an obturator, a needle and a needle operating mechanism able to move the needle in translation. The obturator duct is connected to the vacuum and gas supply devices, to remove any residues of fluid aspirated.Type: GrantFiled: April 9, 2010Date of Patent: July 23, 2013Assignee: Flextech, S.r.l.Inventor: Fulvio Laguzzi
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Patent number: 8028723Abstract: A receiving container is filled with a predetermined target mass mz of a free-flowing substance from a reservoir with the help of a dosage-dispensing device that dispenses measured doses of the substance. The device has a valve for variably setting the mass flow {dot over (m)} from the reservoir into the receiving container. The device is also able to determine the time t that has elapsed since the beginning of the fill cycle, the mass m of the substance present in the receiving container, and a unit for controlling the valve. The controller unit includes estimating and correction modules. At least once during the fill cycle, the estimating module performs an estimate of the mass {tilde over (m)}(t, t2) that is expected to be present in the receiving container at the end of the fill cycle at the time t2. This estimate is based on the assumptions that from the time t onward the valve is being closed according to a predefined closing-down profile and the fill cycle is completed at the time t2.Type: GrantFiled: May 18, 2009Date of Patent: October 4, 2011Assignee: Mettler-Toledo AGInventor: Marc Blöchlinger
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Patent number: 7987879Abstract: Methods and apparatus enable filling a receptacle with solid particles introduced into the receptacle with a controlled flow rate and pattern of distribution of the particles. A pneumatic loader may dispense the particles into the receptacle with ability to adjust the flow rate and pattern of distribution of the particles. Further, a laser sensor may enable detecting a topographic level of the particles loaded by movement of the laser sensor around a point to make linear measurements across the reactor at multiple angularly offset orientations.Type: GrantFiled: March 7, 2007Date of Patent: August 2, 2011Assignee: Cat Tech, Inc.Inventors: Mathis Paul Comardo, Stephen Darius Bryant
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Patent number: 7963305Abstract: Filling valve (5) including: a hollow housing (11) having a valve seat (25); a moving valve rod (14) slidingly mounted in the housing (11) and having a sealing surface (23), the moving valve rod (14) and the hollow housing (11) together defining a liquid chamber (18); a liquid inlet (26) for putting the liquid chamber (18) into communication with a liquid supply pipe (6); a device for putting the valve rod (14) in a first, full-open position, in which the sealing surface (23) is spaced from the valve seat (25), thereby forming a passage (27) for the liquid; a device for putting the valve rod (14) in a second, closed position, in which the sealing surface (23) is in sealing contact with the valve seat (25), thereby closing the passage (27), and a device for putting the valve rod (14) in a third, predetermined, semi-open position in which the sealing surface (23) is spaced from the valve seat (25) but closer to the same than in the full-open position.Type: GrantFiled: July 28, 2005Date of Patent: June 21, 2011Assignee: Sidel ParticipationsInventors: Andrea Lupi, Fabrizio Vaia
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Patent number: 7584770Abstract: An integrated filler system to transfer a filler product from a filler product source to a product receptacle is provided. The integrated filler system includes a cylinder housing, a pallet valve disposed within the cylinder housing that contains a product flow aperture, and a piston inserted in a valve bore of the pallet valve. A linear actuator is connected to the piston to selectively actuate a linear travel of the piston within the valve bore. A rotary actuator is connected to the pallet valve to selectively position the product flow aperture to fluidly communicate with either a product input port or a product output port formed in the cylinder housing.Type: GrantFiled: January 30, 2007Date of Patent: September 8, 2009Assignee: Stainless Specialists, Inc.Inventors: Glenn Anderson, Stephen Howard
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Patent number: 7278454Abstract: A beverage dispensing device for dispensing pressurized beverages at a high flow rate without producing excessive foaming comprising a streamlined valve assembly and a downward extending nozzle assembly which permits a range of containers to be filled from the bottom.Type: GrantFiled: March 13, 2003Date of Patent: October 9, 2007Assignee: Laminar Technologies, LLCInventor: Matthew C. Younkle
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Patent number: 7261131Abstract: A closure system for a fluid outlet is disclosed which includes a motor threadably connected to a hub which, in turn, is connected to a closure element or cup that provides a sealing cover beneath one or more nozzles. The action of the motor initially lowers the closure element vertically before pivoting the closure element away from the area directly beneath the nozzle or nozzles. After fluid is dispensed, a biasing element pivots the closure element back into place before it is raised vertically again to provide a seal or cover for the one or more nozzles. The hub is designed to pivot only a partial revolution and the pivoting action of the hub and closure element away from the nozzle area overcomes the bias of the biasing element contained within the hub. The biasing element then pivots the hub and closure element back into place before the biasing element raises the hub and closure element to its original position.Type: GrantFiled: March 16, 2004Date of Patent: August 28, 2007Assignee: Fluid Management, Inc.Inventors: James R. Cleveland, Tim Hogan
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Patent number: 7040359Abstract: A removable nozzle for attachment to a conventional faucet of a beverage dispensing device to permit the dispensing of a pressurized beverages at a high flow rate without producing excessive foaming comprising a streamlined valve assembly and a downward extending nozzle assembly which permits a range of containers to be filled from the bottom.Type: GrantFiled: August 11, 2003Date of Patent: May 9, 2006Assignee: Laminar Technologies, LLCInventor: Matthew C. Younkle
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Patent number: 7040360Abstract: One embodiment of an anti-siphon fuel filler assembly includes a tube having a first end region adapted to be positioned in a fuel tank for allowing fuel to flow therethrough into said tank, the first end region including a first crimp and a second crimp, and a restriction structure positioned in the tube between the first crimp and the second crimp, the restriction structure including apertures sized for allowing fuel to flow therethrough while preventing the insertion of a siphon hose into the tank.Type: GrantFiled: September 5, 2003Date of Patent: May 9, 2006Inventor: Kenneth A. Watson
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Patent number: 7036538Abstract: A device for filling a bag with bulk material. The device includes a charging hopper, a filling pipe adjoining the lower end of the charging hopper, a conveyor worm arranged in the filling pipe and drivingly connected to a rotary driving motor, as well as a height-adjustable closing element which is connected to the conveyor worm and which is arranged at the lower end of the filling pipe, wherein the rotary driving motor together with the conveyor worm and the closing element are arranged so as to be height-adjustable relative to the filling pipe.Type: GrantFiled: September 3, 2004Date of Patent: May 2, 2006Assignee: Chronos Richardson GmbHInventor: Werner Schlosser
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Patent number: 7013936Abstract: An arrangement for decanting liquids includes a tubular-shaped support (1) having a flow channel (2). The flow channel (2) is blocked by a valve plate (3) which is coupled via axial connecting elements (4, 4?) to the relative movement of an inner sleeve (5) and an outer sleeve (6) of the support (1). The outer sleeve (6) lies in overlapment and the axial connecting elements (4, 4?) extend into the interior of the support. The valve plate (3) can be lifted from its valve seat against a spring force engaging at the inner sleeve (5) and at the outer sleeve (6). A radial flange collar (13) is formed on the outer sleeve (6). To ensure an accurate metering at the highest possible volume flow of the discharged liquid at low manufacturing costs, the valve plate (3) is mounted at a free end (9) of the support (1) and the axial connecting elements are configured as tension rods (4, 4?) and are arranged next to an edge of the valve plate (3).Type: GrantFiled: August 20, 2003Date of Patent: March 21, 2006Assignee: Andreas Stihl AG & Co. KGInventors: Harald Schliemann, Hans Nickel
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Patent number: 6945287Abstract: A backflow blocker prevents backflow of gas to a lower pressure first stage of a system for processing particles from a downstream higher pressure second stage of the system. The blocker comprises an upright duct connecting the first stage to the second stage. The duct is at least partly filled with a column of particles passing from the first stage to the second stage. By properly selecting the duct dimensions and by controlling the flow rate of particles into and from the duct, the velocity of downwardly moving particles in the duct can be made to exceed the velocity at which the gasses flow through the particles in the duct. This prevents gasses from flowing from the lower pressure downstream stage to the higher pressure upstream stage.Type: GrantFiled: November 24, 2003Date of Patent: September 20, 2005Assignee: Crown Iron Works CompanyInventor: George E. Anderson
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Patent number: 6889732Abstract: A vapor recovery spout for a portable fuel container. The spout includes an inner sleeve attached to the container to provide a fuel flow passage through the spout. The passage has an outlet port for fuel to flow through into a tank. A sliding sleeve is mounted on the inner sleeve for sliding axial movement from an outwardly extended position to a retracted position. A radially extending annular seal is mounted on the sliding sleeve for sealing the fuel tank opening when the spout is inserted. Vapor recovery passages are provided between the inner sleeve and the sliding sleeve for displaced vapor to flow from the tank to the container. The sliding sleeve closes the fuel passage and the vapor recovery passageways when in its extended position and opens the fuel passage and the vapor recovery passageways when in its retracted position. A spring urges the sliding sleeve to its extended position.Type: GrantFiled: August 5, 2003Date of Patent: May 10, 2005Inventor: Clifford Harry Allen
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Patent number: 6810921Abstract: A method of filling containers, especially bags, with bulk material by a feeding funnel and a filler pipe. The filler pipe adjoins the lower end of the feeding funnel. An axially displaceable and rotatable conveying unit is arranged co-axially within the filler pipe. An axially displaceable and rotatable closing element is firmly connected to the lower end of the conveying unit. The bulk material, while being conveyed by the conveying unit in the filler pipe, is simultaneously mechanically agitated in the filling funnel, or simultaneously mechanically conveyed in the filling funnel towards the filler pipe.Type: GrantFiled: October 28, 2002Date of Patent: November 2, 2004Assignee: BMH Chronos Richardson, GmbHInventor: Werner Schlösser
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Patent number: 6675840Abstract: A fill probe with an in-line mixer accelerates and facilitates automation of a fill and mix procedure required in formulating certain chemical products. In some formulas, the concentrated chemical components that combine to form the resulting formula (e.g., teat dip) have a wide range of viscosities. The in-line positioning of the mixing attachment with the fill probe on the outside of the fill probe creates a dual action mixing operation that mixes the components as they are deliver to a mixing container and continues to mix them after they are combined with other chemicals within the mixing container. By using a combination fill probe and in-line mixer of the claimed design, a user can automate the fill and mix process, decrease the required mix time, and reduce foaming and spillage of chemicals.Type: GrantFiled: September 20, 2001Date of Patent: January 13, 2004Assignee: Ecolab, Inc.Inventors: Ronald D. Jungmann, Roy F. Johnson, Richard V. Mullen
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Patent number: 6598631Abstract: A device is provided for the mixing of one or more concentrates and/or diluents at an interface between a container and a filling head as the container is filled using said filling head. In one embodiment, the process includes engaging said filling head and a fill aperture of said container so as to provide a direct path from said filling machine to the interior of the container; passing one or more concentrates and/or diluents to said filling head component, so as to mix said concentrate(s) and/or diluent(s); and passing the product thereby mixed at said interface to the interior of the container; and devices for use therein.Type: GrantFiled: April 25, 2001Date of Patent: July 29, 2003Assignee: Shell Oil CompanyInventors: Timothy Hewlitt, Steven Kelsey, William Maskell, Jerard O'Brien
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Patent number: 6478058Abstract: A pouring spout is described that has sections cut away from the sleeve of the spout contiguous to an exit, as well as a means for setting the maximum distance the inner sleeve can be pushed past the outer sleeve of the spout.Type: GrantFiled: July 2, 2001Date of Patent: November 12, 2002Assignee: Scepter CorporationInventor: Michael Pears
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Patent number: 6408899Abstract: An apparatus for encrusting a filling material is provided. The apparatus includes a screw-transferring apparatus to transfer a filling material and encrusting material, and vane pumps to transfer the respective filling and encrusting materials to a combining nozzle. The combining nozzle combines the crust that is supplied by the vane pump for crusts out of the filling material that is supplied by the vane pump for filling materials. Each screw-transferring apparatus includes horizontal screws. Each vane pump has a vertical rotating shaft. The end of each screw is free and is positioned at the inlet of each vane pump. At the inlet of each vane pump a food-guide plane is formed. That plane is tangent to a trajectory of the outer edge of the vane of the vane pump. The trajectory forms a circle that has the biggest diameter among all of the trajectories defined by the outer edges of the vanes when the vanes rotate.Type: GrantFiled: June 12, 2001Date of Patent: June 25, 2002Assignee: Rheon Automatic Machinery Co., Ltd.Inventors: Torahiko Hayashi, Yasunori Tashiro
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Patent number: 6354339Abstract: A dispensing apparatus for granular or powdery bulk materials includes a balance (15) to weigh the doses of material being dispensed, a reservoir container (1), and a cover (2) to close the downward-facing opening of the storage container (1). Integrated in the cover (2) is a conveying and delivering device with a vertically movable, rotary conveyor body (5) designed so that it can substantially close off the dispensing outlet (14) for the bulk material. The conveyor body has a ring-shaped bottom (6) sweeping a ring-shaped conveyor channel (7) that is recessed in the cover (2). The outlet (14) is arranged in the ring-shaped channel (7) and is designed to deliver a directed and locally concentrated stream of bulk material.Type: GrantFiled: April 2, 2001Date of Patent: March 12, 2002Assignee: Mettler-Toledo GmbHInventor: Paul Lüchinger
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Patent number: 6119735Abstract: A method of and apparatus for filling a volatile liquid into at least one tank (10) of a multi-tank installation having a vent-pipe (11A, 11B . . . 11F) associated with each tank, all of the vent-pipes being connected to a common vent manifold (13) through respective over-pressure valves (12A, 12B . . . 12F). A vapor extraction manifold (16) is also connected to each over-pressure valve (12A, 12B . . . 12F) and during a tank filling operation is coupled to a vapor extraction mechanism. Both the vent manifold (13) and the extraction manifold (16) are provided with pressure sensitive valves (15, 19) respectively to allow air to enter the manifolds from the ambient when the pressure within the respective manifold falls below atmospheric.Type: GrantFiled: May 13, 1998Date of Patent: September 19, 2000Assignee: Briggs & Stratton CorporationInventor: Rodney Carter
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Patent number: 6047746Abstract: A sand art machine uses a plurality of storage bins for colored granular material, each bin having a discharge orifice and an metering valve connected to the orifice for each bin. The metering valve is connected at a dispensing station above a screen on which a receptacle is positioned such that stray sand passes through the screen into a reclaim hopper from which it can be returned to the supply bin. By using a plurality of variously colored sands a decorative art form in a transparent receptacle is easily fashioned and saved.Type: GrantFiled: August 11, 1998Date of Patent: April 11, 2000Inventor: Scott Green
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Patent number: 5865217Abstract: A filling system of a packaging machine is set forth that reduces the mixing of product and air during the filling of the container with a flowable material such as low fat milk. The fill pipe of the filling system has an elliptical cross-section which provides for a reduced velocity of the flowable material entering the container while allowing for an increased production time of the packaging machine. The fill system is especially adopted to fill containers having a rectangular cross-section. Connected to the fill pipe is a nozzle with flaps designed to substantially conform and engage with the sidewalls of a container. When the flaps are urged to an open position, the mixing of air and product is inhibited as the flowable material is dispensed into the container through the nozzle and as a moving mechanism is operated to relatively move the container and nozzle from a first to a second position. The fill pipe has an elongate body, an inlet end and an outlet end.Type: GrantFiled: March 6, 1997Date of Patent: February 2, 1999Assignee: Tetra Laval Holdings&Finance, SAInventors: Peter Giacomelli, Robert Muns, Anders Andren, Par Svensson
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Patent number: 5819821Abstract: A filling system of a packaging machine is set forth that reduces the mixing of product and air during the filling of a container with a product. The filling system is designed to fill a container having a cross section defined by a plurality of sidewalls, an interior bottom engaging the sidewalls, and an open top. The system includes a fill pump for pumping a liquid product and a fill pipe, the fill pipe having an inlet receiving liquid under pressure from the fill pump and an outlet overlying the container. A nozzle is disposed over the outlet end of the fill pipe. The nozzle comprises a collar for connecting the nozzle to the outlet end of the fill pipe and a plurality of flaps formed from a flexible material extending from the collar. The plurality of flaps are preferably biased to a closed position, such as under their own resilience. The nozzle seals the outlet end of the fill pipe when in this closed position.Type: GrantFiled: August 1, 1996Date of Patent: October 13, 1998Assignee: Tetra Laval Holdings & Finance, S.A.Inventor: Peter Giacomelli
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Patent number: 5787947Abstract: A flexible nozzle integrated with a transformable wire which provides for a greater opening of the nozzle during the distribution of a desired contents into a container. The greater opening reduces the velocity of the desired content thereby reducing or eliminating frothing which may hamper the sealing of the container. The transformable wire may be composed of a marmem material or a piezoelectric material. A marmem material is a shape memory alloy. For example, the marmem material may be a nitinol alloy. If a marmem material is utilized, the wire is heated above the marmem material's critical temperature in order to open the nozzle. As the desired contents flow through the nozzle, the marmem material is cooled below its critical temperature and transformed to a second shape thereby closing the nozzle. The process is repeated for each container to be filled with the desired contents.Type: GrantFiled: November 19, 1996Date of Patent: August 4, 1998Assignee: Tetra Laval Holdings & Finance S.A.Inventor: John Hertsgaard
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Patent number: 5758698Abstract: A filling system for filling a container is set forth. The container to be filled has a bottom portion and a plurality of sidewalls defining a container cross-section. The filling system comprises a fill pipe having a product inlet and a product outlet, a valve rod disposed in the fill pipe, a flexible outlet extension, and an umbrella-shaped sealing member having a bottom portion. The valve rod and the sealing member are movable between a first position in which the sealing member engages and seals the product outlet and a second position in which the sealing member is disengaged from the product outlet. The bottom portion of the sealing member is preferably shaped to conform to the interior bottom portion of the container. The flexible outlet extension extends from the product outlet and is dimensioned to engage and conform to the sidewalls of the container during filling thereby to inhibit mixing of product and air during the filling cycle.Type: GrantFiled: August 1, 1996Date of Patent: June 2, 1998Assignee: Tetra Laval Holdings & Finance, S.A.Inventor: Yutaka Kaneko
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Patent number: 5657801Abstract: A filling head comprising inner and outer concentric cylindrical ducts, hingedly connected doors movable between an open depending position and a horizontal position closing the lower ends of the ducts in response to movement of the outer duct between a raised position and a lowered position respectively.Type: GrantFiled: October 19, 1995Date of Patent: August 19, 1997Assignee: Bagfilla Overseas LimitedInventor: Peter Ellis
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Patent number: 5335862Abstract: A liquid filling assembly includes a discharge nozzle arrangement which includes a closely wound spring operatively connected at its outer periphery to a diffuser chamber and including a plurality of coils adapted to retain a volume of fluid thereabove until the fluid is forced under pressure against the spring or an associated valve to urge the coils apart to provide clearances therebetween for the flow therethrough of the fluid.Type: GrantFiled: November 5, 1992Date of Patent: August 9, 1994Assignee: Elopak Systems A.G.Inventor: Leo J. Esper
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Patent number: 5244020Abstract: A dispenser of foodstuff is particularly well adapted to deliver cheese for pizza making. A refrigerator contains a bin which may be completely removed from said refrigerator for cleaning, as in a dishwasher, for example. The bin features inwardly sloping walls so that the cheese does not normally stick to the wall. An auger delivers the cheese to a spout where a star wheel meters flow and breaks up any clumps in the cheese. A spring biased trap door closes the spout, especially when the bin is removed from the refrigerator. The refrigerator contains parts which control the opening and closing of the trap door and the turning of the auger. The entire system operates under the control of a programmable microprocessor which includes means for detecting when the bin is empty or is failing to delivery the cheese.Type: GrantFiled: July 24, 1991Date of Patent: September 14, 1993Assignee: Middleby Marshall Inc.Inventors: Adrian A. Bruno, Richard Caron, Gorm Bressner, Kevin Barnes, Philip Carbone, Robert Simek
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Patent number: 5193593Abstract: A valve is provided for filling containers which eliminates splashing and dripping. As the container is being filled, the valve is moved upwardly so as to be a set distance above the level of the contents of the container during filling. In addition, the liquid passes through an anti-splash screen as it exits the valve. In a further feature, associated with the screen are one or more suction units which operate at the cessation of liquid flow from the valve to remove liquid from the screen and preventing dripping. The combination of the valve moving upwardly during container filling, a screen, and suction units associated with the screen function to prevent splashing during filling and dripping after filling.Type: GrantFiled: February 27, 1992Date of Patent: March 16, 1993Assignee: Colgate-Palmolive CompanyInventors: Jean M. Denis, Patrick Devos
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Patent number: 4966205Abstract: The present invention relates to a method and apparatus for charging a cosmetic material which is capable of providing a transparent cosmetic material containing a three-dimensional pattern formed by a coloring material. Method and apparatus are provided for charging a transparent gel base as well as a coloring material into a charging nozzle and injecting the transparent gel base and coloring material from the tip of the charging nozzle into a vessel. The vessel can be rotated and at least one of the vessel and charging nozzle can be moved in longitudinal directions.Type: GrantFiled: December 14, 1988Date of Patent: October 30, 1990Assignee: Pola Chemical Industries Ltd.Inventor: Yoshinori Tanaka
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Patent number: 4821782Abstract: A hopper-feeder system for feeding stored powders at a uniform, controllable and predetermined rate. A spiral convoluted stirring agitator in close proximity and conforming to the hopper wall is rotated in a direction tending to lift and dilate the powder, counteracting its tendency to bridge and to undergo intermittent or non-uniform changes in density and rate of discharge. The head load upon the feeder as well as the material damping effect on the feeder are controlled by a column cutter on the agitator that undercuts the column of powder extending through the hopper opening.Type: GrantFiled: January 29, 1987Date of Patent: April 18, 1989Assignee: Hyer Industries, Inc.Inventor: Frank S. Hyer
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Patent number: 4792068Abstract: A nozzle with at least one opening that can be closed off, and especially a nozzle for packaging machines, including those that handle liquid products, with a valve body in the form of a piston that moves back and forth between a retracted position wherein it leaves the opening free and an advanced position wherein it completely closes off the opening. The object is to provide a nozzle with highly effective product-trimming action and continued piston operation even during the sterilization process. A guide for the piston has at least two positioning surfaces that operate in conjunction with two essentially opposite surfaces on the piston and precisely position it in the nozzle opening. The piston is axially divided or slit. Tensioning components force the halves of the piston apart and tight against the walls of the nozzle opening.Type: GrantFiled: October 15, 1987Date of Patent: December 20, 1988Assignee: PKL Verpackungssysteme GmbHInventor: Lars Trygg