JPH05130857A - Method for producing cigarette in continuous flow - Google Patents

Abstract

PURPOSE: To control the forward moving velocity of a paper strip by comparing a timing in an specific state concerning a continuous paper strip carrying the indication mark of the cigarettes of a continuous flow. CONSTITUTION: At the time of producing the cigarettes 14 of a continuous flow, the continuous paper strip 4 carrying the indication marks 20 and 25 of the continuous and regular intervals is supplied for a reprenishing section 8 supplied with the flow of cut tobacco on the strip 4. The strip 4 passes through a first detector 21 issuing a first signal when each indication mark 20 and 25 passes at a prescribed velocity and advances to a crossing cutter 13 operating related with a second detector 22 issuing a second signal at the time of each cutting operation. Thus, the timing of each second signal is compared with the timing of a corresponding first signal to obtain a continuous third signal to control the advancing velocity of the paper stop 4 through the third signal.

Description

Detailed Description of the Invention

[0001]

This invention relates to at least one cigarette.
Relates to a method of producing two continuous streams.

[0002]

In a known cigarette making machine, a continuous strip of paper is fed onto a motor-driven conveyor belt, along with a bed forming a continuous cigarette rod, and a stream of chopped cigarettes is fed onto the paper strip. Through the filling department,
Supplied.

A printing device is provided along the path of the paper strip, upstream from the filling station, for printing brand names or trademarks on the strip at equal intervals equal to the length of the cigarette.

In machines of the above type, especially when operated for a fixed length of time, the position of printing changes with respect to the cutter, for example due to changes in conveyor belt speed.

To prevent this, control means are provided to detect print movement and to restore the paper strip to the correct position with respect to the cutter via the transmission means.

However, while eliminating the above-mentioned drawbacks, such a method also influences the length of the cigarette, the variation of the length of which is obviously only permitted within certain limits.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing at least one continuous stream of cigarettes adapted to overcome the above mentioned drawbacks associated with the known prior art. Is.

[0008]

SUMMARY OF THE INVENTION In accordance with the invention, a continuous strip of paper, at a predetermined forward speed, is fed to a transverse cutter through a filling station where a stream of chopped tobacco is fed onto said strip of paper. Feeding, the paper strip carrying a series of evenly spaced indicator marks equal to the length of the cigarette being produced, and the paper strip folds around the stream of carved cigarettes upstream of the cutter. A method of producing at least one continuous stream of cigarettes, comprising the steps of forming a continuous cigarette rod and cutting the cigarette rod with the cutter, the paper strip comprising Is advanced through a first detector that emits a first signal upon passage of at least a portion of the cutter, and the cutter is actuated in association with a second detector that emits a second signal at each cutting action. The first and second signals have respective timings, and the timing of each second signal is compared with the timing of the corresponding first signal to obtain a third signal proportional to the difference between these timings. Thus, a method for producing a continuous stream of cigarettes is provided, characterized in that the speed of advance is controlled via the continuation of the third signal.

Preferably, in the above method, the indicator marks are formed on the paper strip prior to use in the cigarette making machine.

[0010]

The invention is described below by way of example with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 designates a cigarette-making machine, which comprises a base 2 carrying a device 3 for supplying a continuous strip 4 of paper of cigarettes.

In the delivery section of the device 3, the strip 4 wraps around a transmission roller 5, by means of which the strip 4 is supported in a fixed position on the base 2 and supports the top branch of the conveyor belt 7. On the bed 6 which is horizontally horizontal.

As the bed 6 advances,
The strip 4 is fed through a filling station 8 in which a continuous stream of chopped tobacco is fed onto the strip by means of a suction conveyor belt 9 at the feed of a known feeding unit 10.

Downstream of the filling station 8, the strip 4 is
One of the known beams 11 (not shown in detail) forming a continuous cigarette rod and having a gradually shrinking curved inner cross section, the last part of which is essentially cylindrical. Engage the device. The strip 4 is thus folded laterally around the chopped tobacco in a known manner to form a continuous cigarette rod 12.

At the end of the bed 6, the rod 12 is fed through a known cutter 13, which causes the rod 1 to move.
2 is cut into a continuous stream of cigarettes 14.

As shown in FIG. 1, the belt 7 is wrapped around two transmission rollers 15 and 16 at each end of the bed 6,
Further, it is wound around a driving means provided with a driving roller 17 driven by a driving device 18 connected to a known control circuit 18 'described later.

Two tensioning rollers 19 parallel to the rollers 15 and 16 are provided between the drive roller 17 and each of the rollers 15 and 16.

As shown in FIG. 2, prior to being used in the machine 1, the strip 4 is provided with printing indicator marks 20 at equal intervals equal to the length of the cigarette 14.

As shown in FIG. 1, a detector 21 is provided in the vicinity of the passage of the strip 4 so as to emit a signal consisting of an electric pulse when passing each mark 20.

Similarly, the cutter 13 is a known detector 22.
And an electrical pulse, hereinafter referred to as a "mechanical pulse or signal", is emitted at each cutting action.

The pulses emitted by the detectors 21 and 22 quantify the amount of change in the timing of these two signals with respect to a given value and represent the absolute value and the positive or negative signal of said change respectively. And the input of a control circuit 23 comprising a block 24 for issuing a second signal.

Prior to starting operation of the machine 1, the operator positions the pre-printed strip 4 to ensure that the cigarette stick 12 is cut by the cutter 13 at a predetermined distance from the indicator mark 20.

Under normal operating conditions, ie when the above conditions are fulfilled, a zero signal is emitted by the quantification block 24, which causes the drive device 18 via the pulley 17 and the conveyor 7 to strip. Maintain a constant running speed of 4.

On the other hand, when there is a change in the timing of the cutting action with respect to the detection of the mark 20 by the detector 21 due to wear or slack of the conveyor 7 or a change in the interval between the marks 20, the quantification block 24 is , Two non-zero output signals respectively representing the absolute value and the positive or negative signal of said change.

On the basis of said signal, the drive 18 adjusts the speed of the roller 17 and thus also the running speed of the strip 4 to restore the correct timing of the cutting action for the detection of the mark 20 by the detector 21.

With the above adjustment, the quantification block 24
The output signal from will eventually return to zero.

As shown in FIG. 3, the mark 20 can be replaced by an array of holes 25 formed in the strip 4 to produce a so-called "ventilated cigarette".

Instead of changing the speed of the pulley 17, the speed of the conveyor 7 is of course replaced by a drive means consisting of a variable diameter pulley (not shown) in place of the pulley 17 as described in US Pat. No. 3,630,092. , But in this case the drive means 18 must be able to change the diameter of the pulley to change the speed of the conveyor 7 in the desired direction.

The method of the present invention is, of course, not limited to the methods described in, for example, US Pat. No. 4,336,812.
It is also applicable to machines that simultaneously manufacture more than three cigarette rods.

[Brief description of drawings]

FIG. 1 is a schematic front view and a partial block diagram of a cigarette manufacturing machine for carrying out the method of the present invention.

2 shows one type of cigarette paper strip that can be used in the machine shown in FIG.

FIG. 3 shows a different type of cigarette paper strip from that of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cigarette cigarette making machine 4 ... Paper strip 7 ... Conveyor belt 8 ... Filling department 12 ... Cigarette tobacco rod body 13 ... Cutter 14 ... Cigarette cigarette 17 ... Driving roller 20 ... Instruction mark 21 ... Detector 22 ... Detector 25 ... Hole Row (perforation)

Claims (6)

[Claims] 1. A method of producing at least one continuous stream cigarette, the cigarette (1) being produced.
4) Indicating marks (2
0) (25) carrying a continuous paper strip (4) through a filling station (8) at a given forward speed, through which a stream of chopped tobacco is fed onto the paper strip (4). Feeding the transverse cutter (13), folding the paper strip (4) around the stream of engraved cigarettes to form a continuous cigarette rod (12) upstream of the cutter (13), A step of cutting the cigarette rod (12) with the cutter (13), wherein the paper strip has the indication mark (2).
0) (25) is advanced through a first detector (21) which emits a first signal when at least part of it passes, and the cutter (13) emits a second signal at each cutting action. Associated with a second detector (22), said first and second
Signal has each timing, and the timing of each second signal is compared with the timing of the corresponding first signal to obtain a third signal proportional to the difference between these timings, and said forward speed is A method of producing a continuous stream of cigarettes, characterized in that it is controlled via said third signal in succession. 2. A method according to claim 1, characterized in that the indicator marks (20) (25) are formed on the paper strip (4) prior to being used in the cigarette making machine (1). .. 3. The paper strip (4), wherein the third signal is a paper strip (4).
Method according to claim 1 or 2, characterized in that it is used to control the rotational speed of the drive roller (17) of the conveyor belt (7) which advances the conveyor belt at said forward speed. 4. The drive roller (1)
Method according to claim 3, characterized in that it is used to change the diameter of 7). 5. A method according to claim 1, characterized in that the indication signal comprises a print mark (20). 6. Method according to one of the claims 1 to 4, characterized in that the indicator mark comprises perforations (25) of the paper strip (4).