CA2135320A1 - Procedure and an apparatus for manufacturing a sack or bag of thermoplastic material having a carrying handle - Google Patents
Procedure and an apparatus for manufacturing a sack or bag of thermoplastic material having a carrying handleInfo
- Publication number
- CA2135320A1 CA2135320A1 CA002135320A CA2135320A CA2135320A1 CA 2135320 A1 CA2135320 A1 CA 2135320A1 CA 002135320 A CA002135320 A CA 002135320A CA 2135320 A CA2135320 A CA 2135320A CA 2135320 A1 CA2135320 A1 CA 2135320A1
- Authority
- CA
- Canada
- Prior art keywords
- handle strip
- web
- fold
- rollers
- bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/06—Handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/86—Forming integral handles or mounting separate handles
- B31B70/864—Mounting separate handles on bags, sheets or webs
- B31B70/87—Applying handles on one side of a moving longitudinally folded web, e.g. after cutting a tubular web longitudinally; Applying handles on both sides of a moving web and folding this web longitudinally afterwards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
Abstract of the Disclosure In order to manufacture a sack or bag of thermoplastic material, a semi-tubular web provided with a sigma-shaped fold joining the overlying web layers has a handle strip of thermoplastic introduced into the fold that is open to the outside which is then welded to the fold by flat welds made at intervals that correspond to the subsequent width of the bag. Then, the bags are separated from the semi-tubular web by transverse weld seams that run through the flat welds. The tension of the handle strip that is introduced into the fold area is controlled in order to prevent the bags or sacks from curving in the area of the fold.
An apparatus for manufacturing the bags or sacks is also disclosed. The apparatus includes a feed system for the handle strip comprising a web storage unit with guide rollers that are fixed to the frame, and rollers that are mounted on a swinging arm, across which the handle strip is guided in a zig-zag path.
The apparatus further includes a pair of pre-tensioning rollers that draws the handle strip into the web storage unit; and a controllable drive system for the swinging arm to pivot the swinging arm to adjust the tension that is desired for the handle strip.
An apparatus for manufacturing the bags or sacks is also disclosed. The apparatus includes a feed system for the handle strip comprising a web storage unit with guide rollers that are fixed to the frame, and rollers that are mounted on a swinging arm, across which the handle strip is guided in a zig-zag path.
The apparatus further includes a pair of pre-tensioning rollers that draws the handle strip into the web storage unit; and a controllable drive system for the swinging arm to pivot the swinging arm to adjust the tension that is desired for the handle strip.
Description
---` 21 35320 A Procedure and an Apparatus for Manufacturing a Sack or Bag of Thermoplastic Material _havinq a Carrying Handle The present invention relates to a procedure for manufacturing a sack or bag of thermoplastic from a semi-tubular web provided with a ~ [sigma]-shaped fold joining the overlying web layers in which a handle strip also of thermoplastic is inserted into the fold that is open to the outside and welded to the fold by flat welds that are made at a spacing that equals the subsequent bag width. The bag is then cut off from the semi-tubular web by transverse weld seams that pass through the flat welds. The present invention also relates to an apparatus for carrying out this procedure.
Bags that are manufactured by this process are preferably used as diaper bags. In order to fill the bag, the package of diapers is slid into the open bottom end of the bag, and then the bottom end is closed by means of a welded cross seam or a transverse weld seam. When the bag is full, the handle strip, which is welded by its ends to the bag, is at the top of the bag, so that it can be grasped conveniently.
In order that bags with handles, such as diaper bags, can be stacked, transported and filled without difficulty, it is desirable that they lie flat once they have been cut off from the semi-tubular web. This assists in stacking. For bags manufactured by known procedures, the problem arises that the handle strip enters the fold with too much tension so that it causes the fold in the bag to contract, and the fold bends. If the handle strip is too long, it causes the fold to undulate.
In either case, it is no longer possible to stack the bags one on top of the other without difficulty.
For this reason, the present invention seeks to provide a procedure by which the handle strip can be installed in the fold , - 2135320 :: ~
of the semi-tubular web, under such tension that the sections of handle strip no longer bend the fold areas of the bag that has been cut off, or cause it to undulate.
According to the present invention, this problem has been solved by a procedure enabling the tension of the handle strip that is inserted into the fold to be controlled. -~
. .... .
During the manufacture of the bag, the operator of the machine observes the bags that are being manufactured, and he varies the tension of the handle strip that is inserted into the fold if he ~-identifies bends or undulations in the fold area of the bags caused by the sections of the handle strip. -~ -" ~ . ' In addition, the tension of the semi-tubular web can also be controlled, so that tension-free and buckle-free welding of the handle-strip sections into the fold of the semi-tubular web can be achieved by controlling the tension of the handle strip and/or the semi-tubular web.
:
According to the present invention, this task has been solved by an apparatus having the following: a pair of pre-tensioning rollers that pull the semi-tubular web with the ~-shaped fold into the apparatus continuously; a web storage unit from which a pair of pre-tensioning rollers, mounted at the start of the processing section, draws off the web intermittently, one bag width at a time; a transverse welding device, in combination with a second pair of pre-tensioning rollers that is driven intermittently and synchronized with the first pair of intermittently driven rollers; a feed system for the handle strip, from which the first pair of intermittently driven rollers draws this handle strip into the processing section; a device that places the handle strip into the fold; a welding system that ~ ;
is arranged between the two pairs of intermittently driven ~-rollers, which makes the flat welds; and a device to discharge ;~
and stack the bags that have been cut off. According to the ` -present invention, this is done such that the supply system for ~ ~, ::
213~320 the handle strip comprises a web storage unit with guide rollers that are mounted on the frame and with a roller that is mounted on a swinging arm, over which the perforated handle strip is guided in a zig-zag shape. A pair of pre-tensioning rollers draw the handle strip continuously into the web storage unit; and a controllable drive system for the swinging arm is also incorporated, to provide the handle strip tension that is required. The particular tension that is required in each instance can be set very simply with the device according to the present invention. This ensures that the section handle strip can be welded into the folds of the semi-tubular web without excess tension and without buckling.
It is most expedient if the drive system comprise a pressure-medium piston-cylinder unit that is articulated onto the swinging arm. The pressure of the pressure medium is controllable by a pressure-regulating valve.
In a further configuration of the present invention, provision is made such that the web storage device for the semi-tubular web comprises guide rollers that are fixed to the frame, and a roller that is mounted on a swinging arm, the swinging arm being pivotable by a controllable drive system, for example, a pressure medium piston-cylinder unit, depending on the web tension that is desired.
One embodiment of the present invention will be described below on the basis of the drawings appended hereto. These drawings show the following:
Figure 1: A diagrammatic side view of the apparatus used to manufacture the bag;
Figure 2: A plan view of the semi-tubular web with the handle strip, with the steps of the process completed by the apparatus that is shown in Figure 1.
.. .
The supply roll 1, from which the semi-tubular web 2 is drawn ~ ~-off, is supported ln a winding apparatus that is conventional and for this reason not shown herein. The semi-tubular web 2 passes over a deflector roller and is then drawn into a web storage unit 4 by a pair of pre-tensioning rollers 3. The web storage unit 4 consists of a plurality of guide rollers 5 that are secured to the frame, and a plurality of guide rollers 8 that are mounted on the swinging arm 7 that can pivot about the shaft 6; the web -is guided in a zig-zag path over the rollers 8, after which it passes over a plurality of fixed guide rollers. The swinging arm 7 is hinged onto the piston rod of a pneumatic cylinder 9 that is articulated onto the frame. The pneumatic cylinder 9 is supplied with compressed air through a line 10 and a pressure regulating valve 11 from a source that is not shown herein. A
pressure gauge 12 is arranged in the compressed-air line 10. A
pair of pre-tensioning rollers 13 intermittently draws the web
Bags that are manufactured by this process are preferably used as diaper bags. In order to fill the bag, the package of diapers is slid into the open bottom end of the bag, and then the bottom end is closed by means of a welded cross seam or a transverse weld seam. When the bag is full, the handle strip, which is welded by its ends to the bag, is at the top of the bag, so that it can be grasped conveniently.
In order that bags with handles, such as diaper bags, can be stacked, transported and filled without difficulty, it is desirable that they lie flat once they have been cut off from the semi-tubular web. This assists in stacking. For bags manufactured by known procedures, the problem arises that the handle strip enters the fold with too much tension so that it causes the fold in the bag to contract, and the fold bends. If the handle strip is too long, it causes the fold to undulate.
In either case, it is no longer possible to stack the bags one on top of the other without difficulty.
For this reason, the present invention seeks to provide a procedure by which the handle strip can be installed in the fold , - 2135320 :: ~
of the semi-tubular web, under such tension that the sections of handle strip no longer bend the fold areas of the bag that has been cut off, or cause it to undulate.
According to the present invention, this problem has been solved by a procedure enabling the tension of the handle strip that is inserted into the fold to be controlled. -~
. .... .
During the manufacture of the bag, the operator of the machine observes the bags that are being manufactured, and he varies the tension of the handle strip that is inserted into the fold if he ~-identifies bends or undulations in the fold area of the bags caused by the sections of the handle strip. -~ -" ~ . ' In addition, the tension of the semi-tubular web can also be controlled, so that tension-free and buckle-free welding of the handle-strip sections into the fold of the semi-tubular web can be achieved by controlling the tension of the handle strip and/or the semi-tubular web.
:
According to the present invention, this task has been solved by an apparatus having the following: a pair of pre-tensioning rollers that pull the semi-tubular web with the ~-shaped fold into the apparatus continuously; a web storage unit from which a pair of pre-tensioning rollers, mounted at the start of the processing section, draws off the web intermittently, one bag width at a time; a transverse welding device, in combination with a second pair of pre-tensioning rollers that is driven intermittently and synchronized with the first pair of intermittently driven rollers; a feed system for the handle strip, from which the first pair of intermittently driven rollers draws this handle strip into the processing section; a device that places the handle strip into the fold; a welding system that ~ ;
is arranged between the two pairs of intermittently driven ~-rollers, which makes the flat welds; and a device to discharge ;~
and stack the bags that have been cut off. According to the ` -present invention, this is done such that the supply system for ~ ~, ::
213~320 the handle strip comprises a web storage unit with guide rollers that are mounted on the frame and with a roller that is mounted on a swinging arm, over which the perforated handle strip is guided in a zig-zag shape. A pair of pre-tensioning rollers draw the handle strip continuously into the web storage unit; and a controllable drive system for the swinging arm is also incorporated, to provide the handle strip tension that is required. The particular tension that is required in each instance can be set very simply with the device according to the present invention. This ensures that the section handle strip can be welded into the folds of the semi-tubular web without excess tension and without buckling.
It is most expedient if the drive system comprise a pressure-medium piston-cylinder unit that is articulated onto the swinging arm. The pressure of the pressure medium is controllable by a pressure-regulating valve.
In a further configuration of the present invention, provision is made such that the web storage device for the semi-tubular web comprises guide rollers that are fixed to the frame, and a roller that is mounted on a swinging arm, the swinging arm being pivotable by a controllable drive system, for example, a pressure medium piston-cylinder unit, depending on the web tension that is desired.
One embodiment of the present invention will be described below on the basis of the drawings appended hereto. These drawings show the following:
Figure 1: A diagrammatic side view of the apparatus used to manufacture the bag;
Figure 2: A plan view of the semi-tubular web with the handle strip, with the steps of the process completed by the apparatus that is shown in Figure 1.
.. .
The supply roll 1, from which the semi-tubular web 2 is drawn ~ ~-off, is supported ln a winding apparatus that is conventional and for this reason not shown herein. The semi-tubular web 2 passes over a deflector roller and is then drawn into a web storage unit 4 by a pair of pre-tensioning rollers 3. The web storage unit 4 consists of a plurality of guide rollers 5 that are secured to the frame, and a plurality of guide rollers 8 that are mounted on the swinging arm 7 that can pivot about the shaft 6; the web -is guided in a zig-zag path over the rollers 8, after which it passes over a plurality of fixed guide rollers. The swinging arm 7 is hinged onto the piston rod of a pneumatic cylinder 9 that is articulated onto the frame. The pneumatic cylinder 9 is supplied with compressed air through a line 10 and a pressure regulating valve 11 from a source that is not shown herein. A
pressure gauge 12 is arranged in the compressed-air line 10. A
pair of pre-tensioning rollers 13 intermittently draws the web
2 from the web storage unit 4 into the processing section one bag width at a time. At the end of the processing section there is a transverse welding device 14; preceded by a pair of pre-tensioning rollers 15 that is driven intermittently, synchronously with the pair of pre-tensioning rollers 13.
Within the processing section, after the intermittently driven pair of pre-tensioning rollers 13, there is a perforating device 16, which makes a transverse perforation 18 in the web, in the area of its sigma-shaped fold 17. This transverse perforation is used to tear open the bag in order to remove its contents.
To one side of, or above the frame, a handle strip roll 19 is supported in a winding system, and within this, a handle strip 20 is drawn off by a pair of pre-tensioning rollers 21. Ahead of the pair of pre-tensioning rollers 21 there is a folding device 22, which folds the handle strip 20 securely onto itself, so that it enters the web storage unit 23 folded lengthwise. The web storage device 23 consists of guide rollers 24 that are fixed to the frame, and of guide rollers 25 that are supported on a swlnging arm 26 that is supported so as to pivot in the frame.
` - ` -:
i,"` ~
213~;320 The swinging arm 26 is articulated onto the piston rod of a pneumatic cylinder 27 that is hinged onto the frame. The pneumatic cylinder 27 is supplied with compressed air by a compressed air line 28, through a pressure regulating valve 29.
A pressure gauge is incorporated in the compressed air line 28.
The handle strip web that has been folded onto itself is similarly drawn into the processing section through the pair of pre-tensioning rollers 13. After the perforating device 16, as viewed in the direction of movement A of the web 2, the folded handle strip web 20 is inserted into the fold 17 of the semi-tubular web 2 with its fold on the inside. This insertion can be effected by a rotating disk [not shown herein].
., On both sides of the line of perforation 18, the web 2 is provided with flat welds 33 in a triangular shape, and these include the fold 17 and the folded handle strip 20 that has been inserted therein. The web 2 is then provided with transverse weld seams 34, which pass through the triangular welds 33 in the manner shown, so that the triangular weld 33 form corner welds of the bags 35, and join the sections 36 of the handle strip with the fold 17 at the end.
The semi-tubular web 2 has a longer web section 37 in which pairs of stacking holes 38 are made in a punching station (not shown herein).
The bags 35 that have been cut off in the welding station 14 are picked up by the arms 40 of a so-called "wicketer" 41, and transported across the top of this to a stack conveyor belt 42, where they are threaded onto stacking pins 43 that pass through the holes 38. As soon as a stack containing a specific number of bags has been threaded onto the stacking pins 43, the stacking conveyor belt is moved ahead by one increment.
:;~
If the operator of the machine sees that the bags 35 that are threaded onto the stacking pins 43 are showing curves or `` 2 1 3 S 3 2 0 undulations in the area of their folds 17, he activates one or both of the pressure regulating valves 11, 29 so as to change the tension of the web(s) entering the web storage unit, so that the -:
sections of handle strip can be welded into the folds 17 in such ~ :~
a way that the handle strips can cause no tension or deformation, which could cause the fold area to curve or undulate in the fold ::
area 17 of the bags 3S.
..: -, .;.
: -
Within the processing section, after the intermittently driven pair of pre-tensioning rollers 13, there is a perforating device 16, which makes a transverse perforation 18 in the web, in the area of its sigma-shaped fold 17. This transverse perforation is used to tear open the bag in order to remove its contents.
To one side of, or above the frame, a handle strip roll 19 is supported in a winding system, and within this, a handle strip 20 is drawn off by a pair of pre-tensioning rollers 21. Ahead of the pair of pre-tensioning rollers 21 there is a folding device 22, which folds the handle strip 20 securely onto itself, so that it enters the web storage unit 23 folded lengthwise. The web storage device 23 consists of guide rollers 24 that are fixed to the frame, and of guide rollers 25 that are supported on a swlnging arm 26 that is supported so as to pivot in the frame.
` - ` -:
i,"` ~
213~;320 The swinging arm 26 is articulated onto the piston rod of a pneumatic cylinder 27 that is hinged onto the frame. The pneumatic cylinder 27 is supplied with compressed air by a compressed air line 28, through a pressure regulating valve 29.
A pressure gauge is incorporated in the compressed air line 28.
The handle strip web that has been folded onto itself is similarly drawn into the processing section through the pair of pre-tensioning rollers 13. After the perforating device 16, as viewed in the direction of movement A of the web 2, the folded handle strip web 20 is inserted into the fold 17 of the semi-tubular web 2 with its fold on the inside. This insertion can be effected by a rotating disk [not shown herein].
., On both sides of the line of perforation 18, the web 2 is provided with flat welds 33 in a triangular shape, and these include the fold 17 and the folded handle strip 20 that has been inserted therein. The web 2 is then provided with transverse weld seams 34, which pass through the triangular welds 33 in the manner shown, so that the triangular weld 33 form corner welds of the bags 35, and join the sections 36 of the handle strip with the fold 17 at the end.
The semi-tubular web 2 has a longer web section 37 in which pairs of stacking holes 38 are made in a punching station (not shown herein).
The bags 35 that have been cut off in the welding station 14 are picked up by the arms 40 of a so-called "wicketer" 41, and transported across the top of this to a stack conveyor belt 42, where they are threaded onto stacking pins 43 that pass through the holes 38. As soon as a stack containing a specific number of bags has been threaded onto the stacking pins 43, the stacking conveyor belt is moved ahead by one increment.
:;~
If the operator of the machine sees that the bags 35 that are threaded onto the stacking pins 43 are showing curves or `` 2 1 3 S 3 2 0 undulations in the area of their folds 17, he activates one or both of the pressure regulating valves 11, 29 so as to change the tension of the web(s) entering the web storage unit, so that the -:
sections of handle strip can be welded into the folds 17 in such ~ :~
a way that the handle strips can cause no tension or deformation, which could cause the fold area to curve or undulate in the fold ::
area 17 of the bags 3S.
..: -, .;.
: -
Claims (5)
1. A procedure for manufacturing a sack or bag of thermoplastic material from a semi-tubular web that has a .SIGMA. [sigma]-shaped fold joining the overlying web layers and having a handle that is of thermoplastic comprising the steps of: inserting a handle strip into the fold that is open to the outside, while controlling the tension of the handle strip; welding the handle strip to the fold by flat welds that are made at a spacing equal to the subsequent bag width; and then cutting off the bag from the semi-tubular web by a transverse weld seam that passes through the flat welds.
2. A procedure as defined in Claim 1, wherein the tension of the semi-tubular web is also controlled.
3. An apparatus for manufacturing a bag or sack of thermoplastic material having a handle comprising:
a pair of pre-tensioning rollers for continuously feeding a semi-tubular web provided with a .SIGMA.-shaped fold into the apparatus;
a web storage unit from which a pair of pre-tensioning rollers, mounted at the start of the processing section, intermittently draws off the web, one bag width at a time;
a transverse weld seam welding device, preceded by a second pair of pre-tensioning rollers driven intermittently, and synchronized with the first pair of intermittently driven pre-tensioning rollers;
a feed system for the handle strip, from which the first pair of intermittently driven rollers draws the handle strip into the processing section;
a device for placing the handle strip into the fold;
a welding system arranged between the two pairs of intermittently driven rollers, for making the flat welds;
a device to discharge and stack the bags that have been cut off;
characterized in that the feed system for the handle strip comprises a web storage unit with guide rollers that are fixed to the frame, and with rollers that are mounted on a swinging arm, across which the handle strip is guided in a zig-zag path;
in that a pair of pre-tensioning rollers that draws the handle strip into the web storage unit is provided; and in that a controllable drive system for the swinging arm is provided, to pivot the swinging arm according to the tension that is desired for the handle strip.
a pair of pre-tensioning rollers for continuously feeding a semi-tubular web provided with a .SIGMA.-shaped fold into the apparatus;
a web storage unit from which a pair of pre-tensioning rollers, mounted at the start of the processing section, intermittently draws off the web, one bag width at a time;
a transverse weld seam welding device, preceded by a second pair of pre-tensioning rollers driven intermittently, and synchronized with the first pair of intermittently driven pre-tensioning rollers;
a feed system for the handle strip, from which the first pair of intermittently driven rollers draws the handle strip into the processing section;
a device for placing the handle strip into the fold;
a welding system arranged between the two pairs of intermittently driven rollers, for making the flat welds;
a device to discharge and stack the bags that have been cut off;
characterized in that the feed system for the handle strip comprises a web storage unit with guide rollers that are fixed to the frame, and with rollers that are mounted on a swinging arm, across which the handle strip is guided in a zig-zag path;
in that a pair of pre-tensioning rollers that draws the handle strip into the web storage unit is provided; and in that a controllable drive system for the swinging arm is provided, to pivot the swinging arm according to the tension that is desired for the handle strip.
4. An apparatus as defined in Claim 3, characterized in that the drive system comprises a pressure medium piston-cylinder unit that is articulated onto the swinging arm;
and that the pressure of the pressure medium is regulated by a pressure regulating valve.
and that the pressure of the pressure medium is regulated by a pressure regulating valve.
5. An apparatus as defined in Claim 3 or Claim 4, characterized in that the web storage unit for the semi-tubular web comprises guide rollers that are fixed to the frame and rollers that are supported on a swinging arm; and that the swinging arm can be pivoted by a controllable drive system, for example, a pressure medium piston-cylinder unit, to provide the web tension that is desired.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4338781.0 | 1993-11-12 | ||
| DE4338781A DE4338781C2 (en) | 1993-11-12 | 1993-11-12 | Process for the production and stacking of sacks or bags made of thermoplastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2135320A1 true CA2135320A1 (en) | 1995-05-13 |
Family
ID=6502512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002135320A Abandoned CA2135320A1 (en) | 1993-11-12 | 1994-11-08 | Procedure and an apparatus for manufacturing a sack or bag of thermoplastic material having a carrying handle |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2135320A1 (en) |
| DE (1) | DE4338781C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107161760A (en) * | 2017-06-15 | 2017-09-15 | 浙江凯澳新材料有限公司 | A kind of cloth storage device of glass-fiber-fabric compounding machine |
| CN110615305A (en) * | 2019-10-08 | 2019-12-27 | 张家港江苏科技大学产业技术研究院 | Braided bag material loading conveyor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT377427B (en) * | 1978-06-26 | 1985-03-25 | Hamann Klaus Jochen | DEVICE FOR SOLVABLE HOLDING OF SMALL PARTS, IN PARTICULAR TOOLS |
| US4730943A (en) * | 1986-11-07 | 1988-03-15 | Johnson James R | Plastic bag with carrying handle |
-
1993
- 1993-11-12 DE DE4338781A patent/DE4338781C2/en not_active Expired - Lifetime
-
1994
- 1994-11-08 CA CA002135320A patent/CA2135320A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107161760A (en) * | 2017-06-15 | 2017-09-15 | 浙江凯澳新材料有限公司 | A kind of cloth storage device of glass-fiber-fabric compounding machine |
| CN110615305A (en) * | 2019-10-08 | 2019-12-27 | 张家港江苏科技大学产业技术研究院 | Braided bag material loading conveyor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4338781C2 (en) | 1997-07-10 |
| DE4338781A1 (en) | 1995-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4328655A (en) | Method of manufacturing a packaged web product and apparatus therefor | |
| US7421832B2 (en) | Supplying a strip of material | |
| EP0396838B1 (en) | Packaging machine | |
| US6132351A (en) | Method and apparatus for making internally-reinforced bag assembly | |
| GB2146575A (en) | The manufacture of thermoplastic bags | |
| US4386924A (en) | Handle bag making apparatus | |
| US6149565A (en) | Method and apparatus for producing bags in two rows with subsequent stacking, especially for the production of bags from flattened blown thermoplastic foil | |
| US4274896A (en) | Method for making sacks which are open at one end and comprise an outer sack of woven plastics tape fabric | |
| DE2819887C2 (en) | Device for producing an arrangement having a carrier tape and flat workpieces arranged on top of one another in scales for storing the workpieces | |
| US6015373A (en) | Method for wicket-top converting of a cross-laminated synthetic resin fiber mesh bag | |
| JPH04284231A (en) | Separator for bag forming machine and bending machine | |
| JP2950994B2 (en) | Method and apparatus for automatically sealing a transport bag | |
| US5009632A (en) | Method and device for joining foil hoses | |
| KR0172114B1 (en) | Machine and method for packaging folded swabs | |
| US6080093A (en) | Apparatus for wicket-top converting of a cross-laminated synthetic resin fiber mesh bag | |
| EP0478325A1 (en) | Folded zipper film and an apparatus and method for making it | |
| US3576154A (en) | Process and apparatus for manufacturing bags comprising a liner bag which protrudes from the opening | |
| EP0348823B1 (en) | Method and device for manufacturing bags with thermoplastic pull strings | |
| US4106395A (en) | Method and apparatus for producing stacks of folded bags | |
| CA2135320A1 (en) | Procedure and an apparatus for manufacturing a sack or bag of thermoplastic material having a carrying handle | |
| US3724340A (en) | Process for manufacturing bags comprising a liner bag which protrudes from the opening | |
| GB2089286A (en) | Manufacture of thermoplastic bags | |
| CA1053953A (en) | Rectangular and flat bottom bag and method of manufacture | |
| NL2031935B1 (en) | Packaging machine for making reinforced packages | |
| WO1992002428A1 (en) | A self-sealing bag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |