JP2881415B1 - Automatic bag making method - Google Patents

Abstract

Kind Code: A1 Abstract: In a bag making apparatus, a transfer amount absorbing section including a step roll group for retaining a film is disposed between a continuous transfer section for transferring a film and an intermittent transfer section. Provided is an automatic bag making method capable of appropriately maintaining a stagnation amount. When a plurality of different types of partial processing are performed on a film to be intermittently transported by a plurality of partial processing stages arranged at unequal intervals in an intermittent transport unit, the continuous transport speed of the film in the continuous transport unit is increased. While the speed is set to a constant speed, the intermittent transfer section intermittently moves the film according to the distance required to reach the next partial processing stage by intermittent transfer of the film and the length of processing time in this stage. This is a configuration in which the intermittent transfer speed of the film by the intermittent drive means in the transfer unit is increased or reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically making bags such as a hanging bag with a header and a pillow bag.

[0002]

2. Description of the Related Art Conventionally, various types of bags have been produced automatically, and a bag supply device for feeding a continuous belt-like film and a continuous drive means for continuously transporting the film. A stepping roll for continuously transporting the film and intermittently transporting the film intermittently by intermittent drive means in order in the transport direction of the film, and for retaining the film between the continuous transporting part and the intermittent transporting part; Is provided.

The continuous belt-like film fed from the film supply unit is continuously transferred while being half-folded by a half-folding unit such as a triangular plate, and is subjected to continuous processing in the continuous transfer unit. For example, gussets and the like are formed on both sides of the half-folded front and back film portions, and the free edges of the front and back film portions are welded and continuously transferred as a tube-shaped strip film.

[0004] After that, the continuous film passes through a transfer amount absorbing section such as a step roll or the like, and is intermittently transferred to the intermittent transfer section, where various partial processing is performed. That is, in the intermittent transfer section, a plurality of partial processing stages are arranged at intervals in the film transfer direction, and after the film is intermittently transferred, a plurality of different types of partial processing are performed each time the film is temporarily stopped. Is done. For example, when the purpose is to make a bag with a header, at the core material mounting stage, a tape-shaped core material for a header is fed out at right angles to the portion to be processed of the tubular strip film, and the core material is removed. After welding to the processed part, the header piece is mounted by dividing.
Thereafter, the film is intermittently transferred, and the header piece is moved from the core material mounting stage to the punching stage, where a hanging hole is opened in the header piece. Furthermore, for example, when the purpose is to form a bag having a slit at the tail end opening, the film is continuously transferred intermittently over a long distance, and the processed portion (the tail end equivalent portion of the bag) is removed. The film is moved to a slit forming stage where slits are formed on both side edges of the film. In this way, after each bag component is partially processed in series in a continuous film in this manner, by separating the respective bag components, the completed bags are sequentially unloaded. I do.

[0005]

A plurality of different types of partial processing in the intermittent transfer section are performed while the film is temporarily stopped by intermittently transferring the film. Such intermittent transfer is made possible by a transfer amount absorbing unit including a group of step rolls arranged between the continuous transfer unit and the intermittent transfer unit. That is, while the film is temporarily stopped in the intermittent transfer unit, the transfer amount absorbing unit keeps the film continuously transferred from the subsequent continuous transfer unit. Then, when the film is intermittently transported in the intermittent transport section, the film that has been retained earlier is fed out and supplied. In addition, when the film in the transfer amount absorbing section becomes excessively stagnant or excessively supplied, the limit switch operates to stop the operation of the bag making machine, thereby stopping the transfer of the film. Therefore, the allowable amount of film stay is set in the transfer amount supply unit, and the operation of the bag making machine is automatically stopped when the allowable amount is less than or greater than the allowable amount.

[0006] By the way, there are various types of bags for packaging products. For example, a bag provided by the present applicant as a packaging bag for long products such as curtain rails has a length of 1 m.
There is a long bag that exceeds. In making such a long bag, the intervals of the plurality of partial processing stages in the intermittent transfer section are long and short, and the processing time is inevitably long and short depending on the content of the partial processing. For this reason, when such a long bag is formed by a conventional bag making machine, when the film is intermittently transferred in the intermittent transfer section, the stagnation of the film in the transfer amount absorbing section deviates from the allowable range. In this case, the operation of the bag making machine must be stopped.

That is, the film is always and continuously supplied from the continuous transfer unit to the transfer amount absorbing unit including the step roll group. Therefore, while the film is stopped in the intermittent transfer section and the film is continuously supplied to the transfer amount absorbing section while the partial processing is performed by the partial processing stage, if the processing time is long, the intermittent transfer section In this case, the stop time of the film becomes longer, the amount of film staying in the transfer amount absorbing section exceeds the allowable amount, and the operation of the bag making machine is automatically stopped.

On the other hand, when the film is intermittently transferred by the intermittent driving means so as to reach the next partial processing stage from the predetermined position in the intermittent transfer section, the film staying in the transfer amount absorbing section is reduced to the intermittent transfer distance. The corresponding length is withdrawn. During this intermittent transfer, the film is continuously supplied to the transfer amount absorbing section by the continuous drive means. In this regard, in the related art, the intermittent transfer speed is set to a constant speed. For this reason, if the intermittent transfer distance is long, the transfer time is long, and conversely, if the intermittent transfer distance is short, the transfer time is also short, so that the stagnation amount of the film in the transfer amount absorbing unit becomes an insufficient state or an excessive state,
If the amount is out of the allowable range, the operation of the bag making machine is automatically stopped.

[0009]

SUMMARY OF THE INVENTION The present invention provides an automatic bag making method which solves the above-mentioned problems, and which is constituted as a first means thereof is a film supply method for feeding out a continuous belt-like film. Unit, a continuous transfer unit that continuously transfers the film by a continuous drive unit, and an intermittent transfer unit that transfers the film intermittently by an intermittent drive unit.
Arranged in order with respect to the transport direction of the film, when performing bag making by an automatic bag making apparatus provided with a transfer amount absorption unit including a step roll group for retaining the film between the continuous transfer unit and the intermittent transfer unit, By arranging a plurality of partial processing stages for performing partial processing on the film intermittently stopped in the intermittent transfer section at unequal intervals with respect to the film transfer direction, a plurality of different types of films are intermittently transferred. In the automatic bag making method of sequentially performing the partial processing, the continuous driving speed of the film by the continuous driving means is set to a constant speed, and the processing portion of the film stopped in the intermittent transfer section is subjected to the next partial processing by the intermittent transfer of the film. Depending on the distance required to reach the stage and the length of processing time in the partial processing stage, the distance between the films by the intermittent drive means In terms of accelerating or decelerating the transport speed.

Further, the present invention is constituted as a second means, comprising: a film supply section for feeding out a continuous belt-like film; and a continuous transfer section for continuously transferring the film at a constant speed by continuous drive means. Intermittent transfer sections for intermittently transferring the film by intermittent driving means, arranged in order in the film transfer direction, and a transfer including a step roll group for retaining the film between the continuous transfer section and the intermittent transfer section. When performing bag making by an automatic bag making device provided with an amount absorbing unit, the partial processing stage for performing partial processing on the film intermittently stopped in the intermittent transfer unit is provided at irregular intervals in the film transfer direction. In the automatic bag making method in which a plurality of different types of partial processing are sequentially performed on the film that is intermittently transferred by disposing a plurality of pieces, the continuous driving means absorbs the transfer amount. The amount of continuous transfer of the film transferred to the part is DrTr (where Dr is the continuous transfer speed of the film by the continuous drive means, and Tr is the transfer time). The intermittent transfer amount of the film required to reach the next partial processing stage by the transfer is VRTR (where VR is the intermittent transfer speed of the film by the intermittent drive means, TR is the transfer time), and the processed part of the film is the i-th part. When the film is transferred to the partial processing stage and processed, the film retention amount of the transfer amount absorbing unit integrated as the difference between the DrTr and the VRTR is represented by K
_i, the lower limit of the allowable amount of the film hold-K _i in the transfer amount absorbing part P, when the upper limit was is Q, the formula: P-K _i
+ DrTr _i <VR _i TR _i <Q−K _i−1 + DrTR _i
Lies in controlling the intermittent feed speed VR _i and the transfer time TR _i of the film by intermittent drive means within the.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

In one embodiment of the automatic bag making apparatus shown in FIG. 1A, a continuous band-like film 1 is provided in the bag making apparatus.
Feeding unit 2 for feeding the film 1 and a continuous transfer unit 4 for continuously transferring the film 1 by a continuous driving means 3 such as a motor.
And an intermittent transfer section 6 for intermittently transferring the film 1 by an intermittent drive means 5 such as a servo motor or a step motor.
Are sequentially arranged in the transport direction of the film, and a transfer amount absorbing section 8 including a step roll group 7 for retaining the film 1 is provided between the continuous transport section 4 and the intermittent transport section 6. Furthermore, the intermittent transfer conveyor 9 and the unloading conveyor 10 are arranged in order following the intermittent transfer section 6.

The film roll 1 of the film supply unit 2
The continuous strip-shaped film 1 fed from 1 is continuously transferred while being half-folded by a half-folding means 12 such as a triangular plate, and is subjected to continuous processing in the continuous transfer section 4. For example, in the case of the illustrated example, a tear tape attaching means 13, a gusset forming means 14, a seam welding means 15, and the like are selected and arranged in the continuous transfer section 4 as necessary.

The tear tape attaching means 13 is shown in FIG.
As shown in (1), a tear tape 16 is attached to at least one of the half-folded front and back film portions 1a and 1b. The tear tape 16 allows the bag body after bag making to be torn freely, and is stuck continuously in the longitudinal direction of the band of the film 1.

As shown in FIG. 2B, the gusset forming means 14 folds the gusset portions 16a, 16b by folding both sides of the half-folded front and back film portions 1a, 1b inward.
To form The gusset portions 16a and 16b are formed continuously in the band longitudinal direction of the film 1.

The seam welding means 15 blows and / or welds the free edges of the half-folded front and back film portions 1a and 1b, thereby forming a tube 1c of a film. In the case of the embodiment in which the gusset portions 16a and 16b are formed, as shown in FIG.
The seam welded portion 18 is formed by fusing the free edges of the front and back film portions 1a and 1b located at the position (1) with the fusing blade 17, thereby forming the tube body 1c with the gusset portions 16a and 16b.

Such a tear tape attaching means 13
The continuous processing selected from the gusset forming means 14 and the seam welding means 15 is continuously performed in the belt longitudinal direction of the film 1 that is continuously transferred. That is, the continuous driving means 3 is operated continuously without a break, and constantly transports the film 1 at a constant speed. In other words, if such a continuous processing is performed in a state where the film 1 is intermittently transferred, the continuous finishing state is impaired. Therefore, it is necessary to perform the continuous processing in a state where the film 1 is constantly transferred. There is.

On the other hand, in the intermittent transfer section 6, partial processing that cannot be performed unless the film 1 is transferred intermittently is performed. That is, the continuous film 1 (the tube body 1c in this example) passes through the transfer amount absorbing section 8 including the step roll group 7, and then reaches the intermittent transfer section 6 while being intermittently transferred by the intermittent drive means 5. Various partial processing is performed. For this reason, in the intermittent transfer section 6, a position detection sensor 19 such as a photoelectric tube and a plurality of partial processing stages S1, S2, S3 are arranged at intervals in the film transfer direction. After the body 1c) is intermittently transferred, a plurality of different types of partial processing are performed each time the body 1c) is temporarily stopped.

Such partial processing stages S1, S2,
In S3, means appropriately selected according to the type of the bag body for bag making is provided. For example, in the case of bag making of a bag body with a header, a core is formed by the partial processing stage S1. The material mounting stage 20 can be configured, and the drilling stage 21 can be configured by the partial processing stage S2. When the purpose is to form a bag having a folded piece at the opening edge of the tail end, the slit forming stage 22 can be constituted by the partial processing stage S3. Others
A stage for forming various types of partial processing, such as forming a notch and attaching an adhesive tape, can be configured.

When the core processing stage S1 forms the core material mounting stage 20 and the partial processing stage S2 forms the drilling stage 21, as shown in FIGS. 3A and 3B, the film 1 (tube body 1c ), A tape-shaped core material 23 for a header is fed out orthogonally to the portion to be processed, and the core material is welded 24 to the portion to be processed. (Tube body 1c) is intermittently transferred and the header piece 25 is transferred.
Is moved from the core mounting stage 20 to the drilling stage 21, where a suspension hole 26 is opened in the header piece 25.

When the slit forming stage 22 is constituted by the partial processing stage S3, as shown in FIG. 3 (C), the film is continuously transferred intermittently over a long distance, and the film to be processed (the portion corresponding to the tail end of the bag body). ) Is moved to the slit forming stage 22, where the film (tube body 1) is moved.
The slits 27 are formed on both side edges of c).

The film 1 (tube body 1c) after the partial processing is transferred from the intermittent transfer section 6 to the intermittent transfer conveyor 9, where it is cut by the cutting means 28 by fusing or cutting so as to form each bag. , Completed one by one
The bags 29 addressed to the sheets are unloaded from the unloading conveyor 10. In the case of the above-described embodiment, as shown in FIG.
The unloaded bag body 29 has gusset portions 16a, 1
6b, a header piece 25 having a hanging hole 26 at the tip.
And a folding piece 30 is provided at the tail end through a slit.

As described above, in order to enable continuous processing in the continuous transfer section 4 and partial processing in the intermittent transfer section 6, the film 1 (tube body 1c) is always driven by the continuous drive means 3 in the continuous transfer section 4. On the other hand, in the intermittent transfer section 6, the intermittent driving means 5 is used.
Is transferred intermittently. In order to enable such continuous transfer and intermittent transfer, a transfer amount absorbing unit 8 including a step roll group 7 is disposed between the continuous transfer unit 4 and the intermittent transfer unit 6.

As shown in FIG. 1B, the transfer amount absorbing section 8
Is composed of a plurality of fixed roll groups 31 arranged in parallel at intervals in the transport direction of the film 1 and a step roll group 7 provided below the fixed roll groups 31 via a frame 32 which can move up and down. The film 1 sent from the continuous transfer unit 4 is wound around a fixed roll and a step roll alternately, and then sent to the intermittent transfer unit 6. Therefore, while the film 1 is temporarily stopped in the intermittent transfer unit 6, the transfer amount absorbing unit 8
When the film 1 is continuously transported from the subsequent continuous transport section 4 toward the
2 descends and makes the film 1 stay. On the other hand, when the film 1 is intermittently transported in the intermittent transport section 6, the film 1 which has been staying first is fed out from the transport amount absorbing section 8 to the intermittent transport section 6. At this time, the step roll group 7
At the same time, the frame 32 moves up.

As described above, the film 1 in the transfer amount absorbing section 8 becomes excessively stagnant, and the frame 32 moves to the lowermost point MA.
When descending beyond X, the limit switch 33 operates,
The continuous driving means 3 is stopped. Also, the transfer amount absorbing unit 8
Of film 1 is oversupplied and the frame 3
When it rises above the uppermost point MIN to 2, the limit switch 34 is activated and the continuous driving means 3 is stopped. For this reason, the allowable amount of film stagnation in the transfer amount absorbing unit 8 is:
It is limited to the MIN and MAX ranges.

As described above, according to the present invention, while the continuous transport speed of the film by the continuous driving means 3 is set to a constant speed, the processed portion of the film stopped in the intermittent transport unit 6 is moved by the intermittent transport of the film. The intermittent transport speed of the film by the intermittent drive means 5 is increased or decreased according to the distance required to reach the partial processing stage and the length of processing time in the partial processing stage.

FIG. 4 is a diagram showing the operation of the transfer amount absorbing section 8 to the intermittent transfer section 6.
Of the film transferred to a plurality of partial processing stages, and a simulation when the film is partially processed is shown in a diagram. The horizontal axis represents the unit time T as a set of the intermittent transfer time TR for each stage and the processing time TS thereat, and N unit times from T ₁ to T _N are integrated. The vertical axis indicates the feed amount of the film drawn from the transfer amount absorbing unit 8 due to the intermittent transfer, and the allowable amount of the film staying amount in the transfer amount absorbing unit 8 is expressed as a parallel line sandwiching a line graph. The line is the lower limit value MIN (P), and the lower line is the upper limit value MAX.
(Q) is shown.

Therefore, according to the present invention, as described below, the drive speed of the intermittent drive means 5 is computer-controlled for each stage represented by each unit time from T ₁ to T _N. Control is performed so that the film staying amount in the transfer amount absorbing unit 8 is always appropriate.

The continuous transfer amount of the film transferred to the transfer amount absorbing unit 8 by the continuous drive unit 3 is DrTr (where Dr is the continuous transfer speed of the film by the continuous drive unit, Tr is the transfer time), and the intermittent transfer unit. The intermittent transfer amount of the film required to make the processed portion of the film stopped at 6 reach the next partial processing stage by the intermittent transfer of the film is VRTR (where VR is the intermittent transfer speed of the film by the intermittent driving means, and TR is Transfer time), the lower limit of the allowable amount of film staying amount in the transfer amount absorbing unit 8 is P,
When the upper limit value is Q, for example, when the film has advanced to the i-th partial processing stage T _{i, the transfer} at the time when the partial processing is completed (at the time when the TS _i is completed and indicated by the reference numeral in FIG. 4). The amount of film staying in the amount absorbing section 8 is as shown by the following [Equation 1], and it is necessary that this is between the lower limit value P and the upper limit value Q of the allowable amount (first condition).

[0030]

(Equation 1)

Further, when the film is intermittently transferred to the i-th partial processing stage T _i , the transfer amount at the time when the transfer is completed and the film is stopped (at the time when TR _i is completed and indicated by the reference numeral in FIG. 4). The film retention amount of the absorbing section 8 is
As shown by the following [Equation 2], this must be between the lower limit value P and the upper limit value Q of the allowable amount (second condition).

[0032]

(Equation 2)

Then, the following [Equation 3] is obtained from the above [Equation 2].

[0034]

(Equation 3)

Therefore, at the time when the film is transferred to the i-th partial processing stage, the accumulated stay amount K _i after the increase and decrease of the film stay amount in the transfer amount absorbing section 8 is repeated by the following equation. 4], this K _i is substituted into the above [Equation 1] to obtain the following equation [Equation 5].
1 and Formula-2 are obtained.

[0036]

(Equation 4)

(Equation 5)

Further, the accumulated stay amount K _i is calculated by the following [Equation 3].
Into the following equation (6) is obtained.

[0038]

(Equation 6)

As a result, the intermittent transport speed VR _{i of the} film
And transfer time TR _i are expressed by the formula: P−K _i + DrTr _i <VR _i
If the speed of the intermittent drive means 5 is increased or decreased so as to be in the range of TR _i <Q−K _i−1 + DrTR _i , the first condition and the second condition described above are always satisfied at the same time, as shown in FIG. As described above, when intermittent transfer and partial machining are repeatedly performed, T ₁
Is controlled so that the film staying amount in the transfer amount absorbing unit 8 is always maintained between the upper limit value Q and the lower limit value P over all stages represented by the unit time from T to T _N.

Therefore, according to the present invention, even in a bag-making apparatus in which the distance between the partial processing stages and the processing time required for the partial processing in each stage are freely set, a situation in which the operation of the apparatus is interrupted is avoided. Is prevented.

At this time, the speed of the intermittent drive means 5 is controlled by using a controllable drive source such as a step motor or a servo motor as the drive means, and by using a microcomputer or the like to control the distance between the partial processing stages and the like. It can be easily implemented by constructing an automatic control system using a computer program that uses the processing time required for the partial processing in each stage as data.

[0042]

According to the present invention, the film supply unit 2 for feeding out a continuous strip of film, the continuous transfer unit 4 for continuously transferring the film by the continuous drive unit 3, and the film by the intermittent drive unit 5. Intermittent transfer unit 6 for intermittent transfer
Are sequentially arranged in the film transfer direction, and the bag is formed by an automatic bag making apparatus provided with a transfer amount absorbing section 8 including a step roll group 7 for retaining the film between the continuous transfer section and the intermittent transfer section. Is performed, the intermittent transfer is performed by arranging a plurality of partial processing stages for performing partial processing on the film intermittently stopped in the intermittent transfer unit 6 at unequal intervals in the film transfer direction. In an automatic bag making method for sequentially performing a plurality of different types of partial processing on a film, the continuous driving speed of the film by the continuous driving unit 3 is set to a constant speed, and the processed portion of the film stopped in the intermittent transporting unit 6 is processed. The intermittent drive means 5 is driven in accordance with the distance required to reach the next partial processing stage by intermittent transfer and the length of processing time in the partial processing stage. Since the intermittent transfer speed of the film is controlled, the amount of film staying in the transfer amount absorbing section 8 can always be regulated within an appropriate allowable range. When making a body bag, it is possible to freely set the distance between partial processing stages and the processing time required for partial processing in each stage, after making the entire device compact, as in the past. There is an effect that the operation of the apparatus is not interrupted during bag making.

[Brief description of the drawings]

1A and 1B show an embodiment of a bag making apparatus for carrying out the present invention, wherein FIG. 1A is an overall explanatory view, and FIG. 1B is an enlarged explanatory view of a transfer amount absorbing section.

FIG. 2 illustrates continuous processing in a continuous transfer section;
(A) is a perspective view showing a tear tape attached state, (B) is a perspective view showing a gusset forming state, and (C) is a perspective view showing a seam welding state.

FIGS. 3A and 3B illustrate a partial processing in an intermittent transfer section and a completed bag body, and FIG. 3A is a perspective view showing a core material attached state;
(B) is a perspective view showing a perforated state, (C) is a perspective view showing a slit formation state, and (D) is a perspective view showing an example of a completed bag.

FIG. 4 is a diagram illustrating a simulation in which an intermittent transfer speed is controlled according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film 2 Film supply part 3 Continuous drive means 4 Continuous transfer part 5 Intermittent drive means 6 Intermittent transfer part 7 Step roll group 8 Transfer amount absorption part 19 Position detection sensor 20 Core material mounting stage (partial processing stage) 21 Drilling stage ( Partial processing stage) 22 Slit forming stage (partial processing stage) 29 Bag 31 Fixed roll group 32 Frame 33, 34 Limit switch

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B31B 1/10 B65B 41/00 B65B 41/16

Claims (2)

(57) [Claims] 1. A film supply unit for feeding a continuous strip of film, a continuous transfer unit for continuously transferring the film by continuous drive means, and an intermittent transfer unit for transferring the film intermittently by intermittent drive means. Are sequentially arranged in the film transfer direction, and bag making is performed by an automatic bag making apparatus provided with a transfer amount absorbing section including a step roll group for retaining the film between the continuous transfer section and the intermittent transfer section. At this time, a plurality of partial processing stages for performing partial processing on the film intermittently stopped in the intermittent transfer unit are arranged at unequal intervals in the film transfer direction, so that a plurality of In the automatic bag making method of sequentially performing different types of partial processing, the continuous driving speed of the film by the continuous driving means is made constant, The intermittent transport speed of the film by the intermittent drive means is determined according to the distance required to cause the processed portion of the film to reach the next partial processing stage by intermittent transport of the film and the length of processing time in the partial processing stage. An automatic bag making method characterized by increasing or decreasing the speed. 2. A film supply unit for feeding a continuous strip of film, a continuous transfer unit for continuously transferring the film at a constant speed by a continuous drive unit, and an intermittent transfer of the film by an intermittent drive unit. The intermittent transfer section is arranged in order in the film transfer direction, and is manufactured by an automatic bag making apparatus in which a transfer amount absorbing section including a step roll group for retaining the film is disposed between the continuous transfer section and the intermittent transfer section. In performing the bag, the plurality of partial processing stages for performing the partial processing on the film intermittently stopped in the intermittent transfer unit are arranged at an irregular interval in the film transfer direction, so that the intermittent transfer is performed. In an automatic bag making method for sequentially performing a plurality of different types of partial processing on a film, the continuous drive amount of the film transferred to the transfer amount absorbing unit by the continuous drive unit is set to D. Tr (where, Dr is the continuous transfer speed of the film by the continuous driving means, Tr is the transfer time), it is necessary for the part to be processed of the film stopped in the intermittent transfer part to reach the next partial processing stage by the intermittent transfer of the film. VRTR for intermittent transfer of film
(Where VR is the intermittent transfer speed of the film by the intermittent drive means, TR is the transfer time), and when the workpiece to be processed of the film is transferred to the i-th partial processing stage for processing, the DrT
When the r and the film retention amount of accumulated the transfer amount absorbing part as the difference VRTR K _i, P the lower limit of the allowable amount of the film hold-K _i in the transfer amount absorbing part, the upper limit was is Q, wherein : P−K _i + DrTr _i <VR _i TR _i <Q−K _i−1
+ DRTr _i automatic bag wherein the controlling the intermittent feed speed VR _i and the transfer time TR _i of the film by intermittent drive means within the.