US2843047A

US2843047A - Means for transportation of viscous liquids

Info

Publication number: US2843047A
Application number: US528606A
Authority: US
Inventors: Korber Kurt
Original assignee: Koerber & Co KG
Current assignee: Koerber & Co KG; Kurt Korber & Co K G
Priority date: 1954-07-31
Filing date: 1955-08-16
Publication date: 1958-07-15
Anticipated expiration: 1975-07-15

Description

ul 15, 1958 K. KORBER 2,8 7

MEANS FOR TRANSPORTATION OF VISCOUS LIQUIDS Filed Aug. 16, 1955 2 Sheets-Sheet .1

INVEN TOR.

Jzorne S July 15, 1958 KQRBER 2,843,047

MEANS FOR TRANSPORTATION 0F VISCOUS LIQUIDS Filed Aug. 16, 1955 2 Sheets-Sheet 2 INVENTOR. zur! Jfdrfie r United States Patent ()f MEANS FOR TRANSPORTATION OF VISCOUS LIQUIDS Kurt Korber, Hamburg-Bergedorf, Germany, assignor to Kurt Korber & C0., many Application August 16, 1955, Serial No. 528,606 Claims priority, application Germany July 31, 1954 Claims. (Cl. 103-84) This invention relates to means for transportation of viscous liquids and particularly to a device for transportation of glue in the manufacture offilter cigarettes.

In connection with bodies, such as rollers, which are immersed in viscous liquids and caused to rotate therein it is a well known fact that during the rotation in the liquid through the clinging or sticking of the liquid due to the adhesion forces thereof velocity increases occur which cause shear stresses that, particularly in liquids of high viscosity such as glue, can assume considerable values.

According to the invention, said fact is utilized for creation of a transportation pressure in a novel devicewhich is readily and inexpensively manufactured and requires a minimum of attendance while meeting all the requirements for automatic transportation, such as uniform transportation, control of the quantity transported, maintenance of the consistency, and disturbance-free start of the transportation following prolonged periods of idleness.

The invention essentially consists of a roller rotating in the liquid container and provided with a groove-shaped recess for the primary transporting of the liquid, said roller cooperating with an outlet that extends tangentially in relation to the recess, in such a way that liquid positively transported in the recess through the adhesion leaves the outlet under pressure.

Above the outlet, a funnel-shaped constriction member is provided which has edges that scrape off the liquid from the periphery of the roller and otherwise are directed towards the outlet whereby the abovementioned transportation pressure is further increased. Thus, the device operates as a pump. In order to permit control of the transported quantity, when required, the cross-section of the passage formed by the funnel-shaped constriction member and the groove-shaped roller recess is variable by means of an adjustment member.

Two embodiments of the invention in association With a machine for the manufacture of filter cigarettes are shown in the drawings, in which:

Fig. 1 shows a section through the transportation device,

Fig. 2 is a plan view of the device of Fig. l, with the cover removed, and

Fig. 3 shows a section through a modified embodiment of the invention.

The glue 2 contained in a receptacle 1 is, according to the invention, moved through the adhesion forces by means of a roller 4 secured to a shaft 3 and rotating in the direction of the arrow. In said roller, at the middle thereof and concentrical with the same, a grooveshaped recess 5 is provided, preferably of rectangular cross-section. Thereby, the size and shape of said crosssection together with the rotary velocity of the roller and the viscosity of the glue determine the obtained transportation quantity and the transportation pressure. The major portion of the transported glue is in the groove- K. G., Hamburg-Bergedorf, Ger- 2,843,047 Patented July 15, 1958 transportation conduit 11 and is transferred into a glue coating device 12 of known kind which is only partially" shown.

With some glue types it has been found that they must be stirred ever so often in order to obtain uniform consistency. For this purpose, the shaft 3 is provided with conveyor means comprising

helical blades

13, 13a the inclination directions of which are opposite in such a way that a flow towards the middle of the glue receptacle and toward the end surfaces of the roller 4 occurs from the openings 14, 14a in the housing through which the shaft 3 extends from its bearings 15, which are secured to the outside of the housing with some space in between.

In the cover 16 of the glue receptacle there is a hole 17 into which a bolt 18 extends one end 19 of which is finger-shaped in such a way that it can extend into the rectangular recess 5. An adjustment screw 20 is rotatably mounted and guided in a plate 21 which is fixedly secured to the cover 16. The threaded end portion 22 of the screw 20 engages a threaded bore 23 in the bolt 18 that is secured against turning movement. According to the adjustment of the screw 20 the cross-section of the passage for the glue is increased or decreased at 24. Hereby, the transported quantity can be controlled over a wide range.

In the modified embodiment of Fig. 3, the glue roller 4' cooperates with a counter-roller 25. This embodiment has the advantage that the glue is still more uniformly worked and that crust formation at the glue surface is avoided through the continuous crushing between the two rollers. In this structure, the provision of helical blades for stirring is unnecessary.

What I claim is:

1. In a device for pressure transportation of viscous liquids, a liquid receptacle adapted to be partially filled with said liquid, a rotatably mounted roller with its major portion immersed in the liquid in said receptacle, a circumferential groove-shaped recess in said roller, outlet means providing a discharge passage in said receptacle and arranged tangentially to said groove-shaped recess in said roller to receive liquid transported by said roller due to adhesion, and a funnel-shaped constriction member forming an inlet mounted in said receptacle and disposed above'said outlet means, said constriction member having roller engaging scraper edges adapted to scrape the liquid from the circumference of the roller and direct the same towards said recess.

2. In a device for pressure transportation of viscous liquids, a liquid receptacle adapted to be partially filled with said liquid, a rotatably mounted roller with its major portion immersed in the liquid in said receptacle, a circumferential groove-shaped recess in said roller, outlet means providing 'a discharge passage in said receptacle and arranged tangentially to said groove-shaped recess in said roller to receive liquid transported by said roller due to adhesion, a funnel-shaped constriction mem ber forming an inlet mounted in said receptacle and disposed above said outlet means, said constriction member having roller engaging scraper edges for scraping the liquid from the circumference of the roller and direct the liquid towards said groove-shaped recess, a fingerin a.

3 shaped member supported in said receptacle with one end disposed in the discharge passage of said outlet mea ns formed by said funnel-shaped constriction member and said groove-shaped recess, and means for adjusting the position of said finger-shaped member whereby to regulate the cross-sectional area of said discharge passage.

3. In a device for pressure transportation of viscous liquids, a liquid receptacle adapted to be partially filled with said liquid, a rotatably mounted roller with its major portion immersed in the liquid in said receptacle, a circumferential groove-shaped recess in said roller, outlet means providing a discharge passage in said receptacle and arranged tangentially to said groove-shaped recess in said roller to receive liquid transported by said roller due to adhesion, and conveyor means disposed in said receptacle at both sides of said roller and rotatable therewith to move the liquid towards the middle of said receptacle and toward the end surfaces of said roller.

4. In a device for pressure transportation of viscous liquids, a liquid receptacle adapted to be partially filled with said liquid, a rotatably mounted roller with its major portion immersed in the liquid in said receptacle, a circumferential groove-shaped recess in said roller, outlet means providing a discharge passage in said receptacle tangential to said groove-shaped recess in said roller to receive liquid transported by said roller due to adhesion, a funnel-shaped constriction member forming an inlet mounted in said receptacle and disposed above said outlet means, a lip formed on said receptacle at said outlet means and extending into said groove-shapedrecess below constriction member, said constriction member having rgllsr e a n Saar?! ed for p n th q i from the upper portion of the circumference of the roller and direct the liquid into said recess.

5. In a device for pressure transportation of .viscous liquids, a liquid receptacle adapted to be partially filled with said liquid, a rotatably mounted roller with its major portion immersed in the liquid in said receptacle, a circumferential groove-shaped recess in said roller, 2 counter-roller rotatably mounted in said receptacle parallel to and adjacent said first mentioned roller and also immersed in said viscous liquid in said receptacle, said counter-roller being arranged so close with its periphery to the periphery of said first mentioned roller so as to form a narrow gap between said two rollers, outlet means providing a discharge passage in said receptacle arranged to extend with its liquid receiving end from below into the gap between said two rollers, and a funnel-shaped constriction member forming an inlet for said outlet means mounted in said receptacle and extending from above into the gap between said two rollers, said constriction member having edges engaging said first mentioned roller to scrape the liquid adhering to the circumference of said first mentioned roller from said circumference and directing it toward said groove-shaped reces s in said roller.

References Cited in the file of this patent UNITED STATES PATENTS