US2917053A - Machine for wrapping tobacco fillers - Google Patents

Description

Dec. 15, 1959 v. BAIR 2,917,053

MACHINE FOR WRAPPING TOBACCO FILLERS Filed Jan. 20, 1958 B! UJVENTOR.

( i-wag BY er/mil -fiain United States Patent MACHINE FOR WRAPPING TOBACCO FILLERS Vernon Bair, Craley, Pa., assignor to Arenco Aktiebolag, Stockholm, Sweden, a firm of Sweden Application January 20, 1958, Serial No. 710,004 Claims priority, application Sweden January 26, 1957 '5 Claims. (Cl. 131-31) The present invention relates to machines for wrapping tobacco fillers so as to form cigars or tobacco products having the configurations of cigarettes.

In the operation of such machines a bunching roller cooperates with a rolling apron upon a rolling table so that the apron with an S-shaped loop encloses the roller at its top portion and the tobacco filler at its lower portion with a mouth directed forwardly in the rolling direction. When producing cigar bunches the apron is likely to jam the tobacco filler and squeeze small particles thereof out of such mouth onto the binder placed on the apron in front of the mouth whereby such tobacco particles might be embedded in the binder which is to be wound on the filler. Furthermore, in the manufacture of such tobacco articles the edge or the end of the binder or wrapper first engaging the tobacco filler is likely to be raised by the air from the mouth and be bent upon itself by the advancing tobacco filler. Also it may happen that such edge or end which is initially applied to the tobacco filler is likely to get loose therefrom and be bent back on itself then being covered by a succeeding portion of the binder or wrapper. It is an object of the invention to remove such drawbacks.

With the above and other objects in view which are apparent from the detailed description below the invention consists in certain constructions and combinations of elements hereinafter fully described, claimed in the claims and shown in the drawings in which:

Figure 1 is a front elevational view of a cigar bunching machine provided with pneumatic means embodying the invention.

Figure 2 is a side elevational view partly in section taken on section line 2-2 of Figure 1.

Figure 3 is a partial top plan view of the machine.

Figure 4 is an enlarged sectional view taken upon section line 44 of Figure 3, and

Figure 5 is a view similar to Figure 3 showing a modification.

In the drawings, similar reference characters indicate like parts in the various views and the term forwardly in the following description denotes a movement to the left in Figures 2, 3, 4 and 5.

The cigar bunching machine is provided with a rolling apron 2 secured to the rolling table 1. The binder B shown more particularly in Figures 3 and 5 is placed upon the rolling table 1 in the manner shown and wound by means of the bunching roller 3 cooperating with the apron 2 about the tobacco filler F when the bunching roller is moved forwardly on the rolling table.

The rolling apron 2 is secured to the front edge of the rolling table 1 and to the rear thereof with a cavity 4 in the rolling table wherein there is formed periodically a pocket for receiving the tobacco for the filler F from a magazine 5. The bunching roller 3 is rotatably mounted in the forked upper end of the lever 6 which is rotatably mounted on a shaft 7 secured to the machine frame 8.

Upon the lever 6 there is provided a cam roller 9 which engages in a cam groove 10 provided in a cam 11 secured to the drive shaft 42 rotatably mounted in the frame 8. The cam groove 10 is of such shape that the lever 6 will periodically move the bunching roller 3 forwardly upon the rolling table 1.

In this movement as particularly shown in Figure 4 the roller 3 will be enclosed in the upper section L of an S-shaped looped portion L of the apron 2 while the lower section L encloses the tobacco filler F and compresses and concentrates the same. In the forward movement the loop L will have a tendency to force air and small tobacco particles out of the mouth 12 formed by the apron below the bunching roller 3. The jet of air leaving the loop L through the mouth 12 has a tendency to raise and blow up the rear edge B of the hinder or wrapper B particularly at the corner B Therefore this edge or corner may be bent upon itself by the advancing tobacco filler F and small tobacco particles are likely to deposit on the binder and be embedded in the convolutions of the same.

These drawbacks and disadvantages will be removed by the invention wherein an air jet is blown through the apron mouth 12 against the tobacco filler F located in the lower portion L of the apron loop L. In order to accomplish this an air nozzle 13 is secured adjacent the bunching roller 3 as shown more particularly in Figure 4. The mouth 14 of the air nozzle is directed obliquely downwardly against the apron 2 immediately in front of the apron mouth 12 and the mouth of the nozzle comprises a narrow slit extending across the bunching table 1 in front of the bunching roller 3. At opposite sides of the rolling table 1 the nozzle 13 is connected to the pipes 15. Both of the pipes 15 extend along the legs of the forked lever 6 and down to the hub 16 of the lever into which they are inserted through the openings 17.

The fixed shaft 7 has a central bore 18 which is connected to a pipe 19 that extends to the compressionside of a fan, not shown. The shaft 7 has a radial opening 20 communicating with the bore 18 and which is in communication with the pipes 15 when the lever 6 is oscillated forwardly.

When the lever 6 occupies its rearmost position the opening 20 is closed by the hub 16 and it is opened when the lever has advanced the bunching roller 3 into the position shown in Figure 2.

When the lever 6 is oscillated forwardly it will first cause the rolling apron 2 to lift the tobacco filler F out of the pocket 4 and completely enclose the same except at the mouth 12 so that the tobacco filler is concentrated by the looped portion L of the apron. Simultaneously the opening 20 is uncovered so that air will be blown out of the nozzle 13 towards and into the mouth 12 of the apron 2 and thereby prevent tobacco particles from being ejected through such mouth.

Upon continued forward movement of the bunching roller 3 the nozzle 13 moves ahead of the mouth 12 so that the jet of air, directed obliquely downwardly against the rolling table 1, will also prevent the binder edge B from being raised or blown up by the air ejected through the mouth 12. The opening 20 can have such a peripheral width that it will either let air through while 'the bunching roller 3 reciprocates on the rolling table 1 or only when the bunching roller is advanced a short distance suflicient to move the tobacco filler F into engagement with the binder edge B and wrap said edge about said tobacco filler.

It may be sufiicient to utilize the air blast only immediately before and during the application of the corner B of the binder edge B to the tobacco filler. In such case a relatively small nozzle 13' may be used as shown Patented Dec. 15, 1959 in the modification disclosed in Figure 5. nozzle has a sectional shape and direction similar to the nozzle shown in Figure 4 but it projects a jet of air only against the binder or wrapper corner B and the apron opening 12 immediately t o the rear of such corner. In this modification it is only necessary to use one of the pipes 15. In all other respects the arrangement is similar to that shown in Figures 1 to 4.

It is thought that the invention and its advantages will be understood from the foregoing description and it is apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing its material advantages, the forms hereinbefore described and illustrated in the drawings being merely preferred embodiments thereof.

I claim:

1. A machine forwrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a rolling apron mounted on said table, a bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and tobacco filler by an S-shaped loop to wind said tobacco filler into a wrapper placed on said apron and means for projecting a jet of air into the portion of said loop enclosing said tobacco filler.

2. A machine for wrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a rolling apron mounted on said table, a bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and tobacco filler by an S-shaped loop to wind said tobacco filler into the wrapper placed on said apron and a nozzle advancing together with said bunching roller and located in front of said roller for projecting a jet of air into the portion of said loop enclosing said tobacco filler.

3. A machine for wrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a roll- This small I ing apron mounted on said table, a bunching roller,

means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and tobacco filler by an S-shaped loop to wind said tobacco filler into the wrapper placed on said apron and a nozzle extending along said bunching roller and advancing together with said bunching roller and located in front of said roller for projecting a jet of air into the portion of said loop enclosing said tobacco filler.

4. A machine for wrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a rolling apron mounted on said table, a bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and tobacco filler by an S-shaped loop to wind said tobacco filler into the wrapper placed on said apron and a nozzle, located at and in front of one end of said bunching roller and advancing together with said bunching roller for projecting a jet of air into the portion of said loop enclosing said tobacco filler. V

'5. A machine for wrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a rolling apron mounted on said table, a bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and tobacco filler by an S-shaped loop to wind said tobacco filler into the wrapper placed on said apron and a nozzle advancing together with said bunching roller and located in front of said roller and directed obliquely downwards against said rolling table for projecting a jet of air into the portion of said loop enclosing said tobacco filler.

References Cited in the file of this patent UNITED STATES PATENTS 405,073 Boman June 11, 1889 1,134,469 Lipe Apr. 6, 1915 2,081,983 Carlson June 1, 1937

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