TWI548510B - Bander for a bag machine and method of banding a roll of bags - Google Patents

Description

Binder for bag making machine and method for bagging a roll

The present invention is generally directed to bag making techniques, and more particularly to the manufacture and winding techniques of bag members.

A variety of different known bag making machines can be used to make the bag from a continuous film such as a polyolefin. Commercially available bag making machines, winders, and folding machines include CMD® Models 3113, 1100 Series, 1500, 4013RO Series, and other implements described by www.cmd-corp.com. Examples of patented prior art bag making machines include U.S. Patent Nos. 6,117,058, 4,934,993, 5,518,559, 5,587, 032, and 4,642, 084, each of each of each of each of

In general, these implements unwind the film from a roll. The film may be a single film, or a folded film, or a (flat) tube. The seal is placed on the membrane at the desired location to form a pocket. The seal can form the bottom/top and/or side of the pocket. Perforations may be included to represent the sides or top/bottom of adjacent pockets. Other operations such as separation and/or folding can be performed.

The bag making machine shown in U.S. Patent No. 6,117,058 is issued by the present invention. All are owned and can be as shown in Figure 1. The prior art rotary bag making machine 100 utilizes a hopper assembly 203, a pair of barrel-in rollers 205 and 206 (203-206 is part of an input section), a sealing cylinder 208, and a pair of barrel-out rollers 210. And 211, a sealing blanket 213, a pair of knife-in rollers 215 and 216, a knife member 218 (which may be any other web processing device such as a punch, knife, die cutter, stamping station, or folding station) A pair of knife exit rollers 219 and 220 (210-220 are part of an output section) and a controller 221 for continuously processing an omentum or film 201. The input or unwinding section as used herein includes a portion of a bag making machine in which the web film can be received, such as a loose roll and a jumper assembly. The output section as used herein includes an assembly that acts on one of the webs downstream of the formed seal, such as a perforator, winder, folder, and the like.

The omentum is provided to a forming barrel 208 via a jumper assembly 203. Cartridge 208 includes a plurality of sealing strips 209. The sealing strip is heated and a seal is formed to form a pocket from the web 201. The retina 201 is held against the barrel 208 (and the sealing strip) by a Teflon® coated carpet. The end-to-end pockets are formed from a seal from the barrel, while the side-to-side pockets are formed from a pair of seals. The barrel diameter can be adjusted and/or smaller than all of the seals that are turned on to determine the distance between the seals and thereby determine the size of the bag.

In general, the rotary motion tool aligns a downstream rotary blade to perforate between the two seals or a seal. The prior art of Figure 1 suggests that after the web 201 exits the barrel 208, it is directed to a rotating blade 218 which creates a perforation between the pockets or detachable adjacent pockets. If the pocket is an end-to-end pocket, the perforation is placed close to a single seal so that when the pocket is separated, the perforated and perforated end points become the top of a pocket and the seal becomes the abutment pocket The bottom of the piece.

Controller 221 is coupled to different components to control speed, position, and the like. The sensor can be used to sense the print on the web to form a seal and/or to align the perforations to the seal (place it in a normal location relative to the seal). Also, the sensor can detect the seal to test at the correct location and create a perforation.

Many bag making machines include a winder located behind the blade. Examples of prior art winders include U.S. Patent Nos. 4,667,890, 4,695,005, 6, 186, 436, and 5, 899, 403, incorporated herein by reference. Prior art winding machines have a rotating turret containing multiple mandrels or a single fixed mandrel and web stop. The desired number of pockets are wound along the mandrel to form a roller. The roller is then pushed and removed, often using a push-pull palm to perform. The prior art describes different ways of properly guiding the leading end of the roll to the desired mandrel and controlling the winding.

Prior art winding machines with multiple mandrels require a turret to be rotated to move the mandrel to the starting and winding positions. This adds complexity to the implement and makes air connections difficult. Also, because the turret rotates, it cooperates with a push-off palm that wipes the mandrel over the circumference of its portion. Moreover, the working system of moving the turret, pushing and unloading the palm and the air corner will interfere or collide with each other. The fixed winder is limited in speed because of the time it takes to move one roll. Prior art winders typically cannot use pneumatic devices in applications exceeding 30 cpm. Instead, a 40 cpm winding machine is required to have a servo-controlled device.

Therefore, it is desirable to have a winder with a fixed mandrel that operates at a higher speed than prior art single mandrel systems. Preferably, the winder can be used in conjunction with a pneumatic device and can easily receive an air connection.

According to a first aspect of the invention, a winding machine for a bag making machine comprises a feed nip and two spindles. The position of each mandrel is along one of the two alternative film paths.

According to a second aspect of the invention, a method for winding a bag from a continuous film comprises feeding the film into a winder and alternately guiding the film along an alternate path to the two mandrels One. The alternating occurs after a plurality of pockets, such as a roller, are wound.

According to a third aspect of the invention, a bag making machine includes a unwinding section, a forming section, and a winder. The winder includes a feed nip and two mandrels, each of which is positioned along a respective alternative film path.

In an alternative embodiment, the mandrel is a fixed position mandrel.

In other embodiments, the alternative membrane path is primarily down.

An overspeed nip can be placed between the feed nip and the alternate film path.

In various embodiments, the overspeed nip operates in an intermittent mode and a per bag mode, and/or has a user adjustable overspeed.

In other embodiments, the winder includes an overlapper between the feed nip and the alternate film path. The overlap can include a plurality of bars that are moved in a track that intersects the film path in at least two locations. The track can be roughly elliptical.

In other embodiments, the overlap includes a plurality of air nozzles.

The overspeed nip has an air nozzle configured to direct the membrane to an alternate membrane path, and other air nozzles configured to direct the membrane to other alternative membrane paths.

In other alternatives, the winder includes a conveyor belt along an alternate film path. The conveyor belt can pivot at the end closest to the feed nip.

In various embodiments, the winder includes a static pinner that may be bipolar along an alternate film path.

In other alternatives, the winder includes pop-up fingers disposed along an alternate film path.

In various embodiments, the winder includes a paper binder adjacent the mandrel.

In one embodiment, the winder is driven by pneumatic air.

In other alternatives, the winder includes a squeegee that wipes the mandrel in substantially 360 degrees.

In accordance with a fourth aspect of the present invention, a winder for a bag making machine or tablet machine includes a feed nip, one or more film guides, and one or more mandrels. The film approaches the feed nip by following an arc of at least 10 degrees fed into the surface of the roller. The film path then passes through the nip and faces the mandrel. The film guide is disposed along a film path that at least the film wraps around the arc of the feed roll and further along the film path downstream of the feed nip. The film guide is recessed into the feed roller at least along the arc.

In accordance with a fifth aspect of the present invention, a method of winding a bag from a continuous film includes at least a 10 degree arc along a surface of the first feed roller to a first feed roller and at least one concave The film guide in the first feed roller is introduced to guide the film. Subsequently, the film is guided by a film guide and a roller to a feed nip. Subsequently, the film is guided to at least one winding station and the bag member is wound.

According to an embodiment, the film guide is fixed and touches the film along the arc.

According to another embodiment, the film guide is further recessed below the surface of the roll at the feed nip.

In various embodiments, the arc is at least 45, 60, and 90 degrees.

In another embodiment, the winder includes a second mandrel and each mandrel is located on an alternate film path.

In another embodiment, a rotatable brush train is disposed such that the film path can follow an alternate film path to direct the film to a selected path.

In other embodiments, an overspeed nip is located on the membrane path downstream of the feed nip and upstream of the brush and/or an air supply is blown from one side and/or the other to the membrane and the membrane is routed from the membrane. Turn to pick up excess film to overlap adjacent pockets. In another embodiment, the air supply source is located upstream of the rotatable brush and downstream of the overspeed nip.

In another embodiment, a finger/guide is configured to access one or more mandrels to remove the rejected bag.

In another embodiment, there are three film guides that extend across the film.

In another embodiment, a second film guide is disposed on the opposite side of the film.

According to a sixth aspect of the invention, a bundling device for a bag making machine includes a conveyor for supplying a reel to a mandrel and two air supply sources. The web is brought closer to the mandrel from a first direction and passes over the mandrel and wraps around the pocket of one of the rolls wound along the mandrel. An air supply is guided to support the web as the web approaches the mandrel. Another source of air is to force the web around the bag of the roll as it passes over the mandrel, while the auxiliary web wraps around the roll. The air supply supports the web as the web wraps around the roll bag member, thereby assisting the web wrap around the roll.

In an alternative embodiment, the first air supply is mounted on an air angle member that is configured to be moved toward and away from the centrifugal shaft.

Those skilled in the art will appreciate the following description, the detailed description, and the claims.

100‧‧‧Previous technical rotary bag making machine

201‧‧‧ Omentum or membrane

201a, 202b‧‧‧ bags

203‧‧‧jumper assembly

205,206‧‧‧

208‧‧‧Forming cylinder, sealing cylinder

209‧‧‧ Sealing strip

210,211‧‧‧Cylinder roll

213‧‧‧Seal blanket

215,216‧‧‧knife roller

218‧‧‧Punch or knife

219,220‧‧‧knife roll

221‧‧‧ Controller

222-225‧‧‧Air nozzle

227,228,327,328‧‧‧Transporter belt

300‧‧‧Winding machine

307,309‧‧‧Speed Roller

311-315‧‧‧ rods

317, 318, 319, 320‧ ‧ overlapping area

322,323‧‧‧Air nozzle

324,325‧‧‧Air nozzle

330,331‧‧‧fixed pin

337,437, 438‧‧‧ mandrel

338‧‧‧Fixed position mandrel

340,341‧‧‧ highlight

342,343,422,433‧‧‧Air corner pieces

345‧‧‧ arrow

346,347‧‧‧paper binding device

403,405‧‧‧Feed the roller

404a, 406a‧‧‧air supply or air nozzle/tube

407,409,468‧‧‧roller

410‧‧‧Support

411a, 413a‧‧‧ rope

412‧‧‧Fixed film guides

416‧‧‧Rotary brush

424‧‧‧Selective hot glue applicator

426‧‧‧Selective strapping device

427,428,610‧‧‧transmitters

440,441‧‧‧ fingers/exfoliation

450,451‧‧‧Classified pallet

460,462‧‧‧membrane guide

464,466‧‧‧ blocks

501‧‧‧ used for the recess of the membrane guide 412

502‧‧‧for the recess of the rope

505‧‧‧Air venting holes

601‧‧‧Reel

608,616‧‧‧air supply, nozzle

612‧‧‧ Roll

615‧‧‧ Guards

618‧‧‧Packet roll

619‧‧‧membrane protectors

1 is a drawing of a prior art bag making machine; FIG. 2 is a drawing of a winder according to the present invention; and FIG. 3 is a drawing of a winder according to the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a diagram of a feed roller according to one embodiment of the present invention; before explaining at least one embodiment of the present invention, it is understood that the present invention is Applications are not limited to the construction and configuration details of the components listed or illustrated in the following description. The invention is capable of other embodiments or of various embodiments. Also, please understand that the phraseology and terminology used herein is for the purpose of description and should not be construed as limiting. Similar numbers are used to represent similar components.

Before explaining at least one embodiment of the present invention, it is understood that the application of the present invention is not limited to the construction and configuration details of the components listed or illustrated in the following description. The invention is capable of other embodiments or of various embodiments. Also, please understand that the phraseology and terminology used herein is for the purpose of description and should not be construed as limiting. Similar numbers are used to represent similar components.

Detailed description of the preferred embodiment

Although the invention will be described with reference to a particular bag making machine, method and winder, it will be understood at the outset that the invention may also be practiced by other implements, methods and winders, including a take-up reel, a rotating overlap machine, Intermittent machines, tablet machines and other known implements.

In general, the invention will be described in connection with a prior art bag making machine or a winder that is part of a bag that is easy to package, transport, dispense, and use. The preferred embodiment is described in a bag machine such as that shown in U.S. Patent No. 6,117,058, or commercially available as a CMD® 1270 bag making machine or a modular bag making machine. The present invention is contemplated as a winder, a winder and separator, a winder, separator and overlap, or a complete bag making machine. The overlap used herein includes a device or section that overlaps the subsequent pockets. A bag making machine located in front of the winder will be described below, which may be the prior art implement described above, as well as other bag making machines.

The winder receives the already formed pockets in a film and can be separated by an overspeed nip. The overspeed nip used herein includes a nip in which at least one driven roller has a greater peripheral velocity than the film velocity in front of the nip. The nip can be operated in a bag mode or in a batch mode so that the bag is only separated at the start/end of the roll. The pattern of each bag used here includes for each bag in a roll. All operate. The batch mode used herein includes not operating for each bag within a roll, such as operating only at the beginning or end of a roll, or only for a plurality of bags within a roll. In each bag mode, the pockets can be overlapped.

After separation, a membrane diverter directs the membrane to one of the two mandrels. Each winding mandrel alternately winds the film, thereby eliminating bottlenecks and allowing for higher speeds, higher cycle speeds, and lower numbers of rolls. The film is guided by the diverter along one of the two alternative membrane paths to one of the two mandrels or the winding station. The film path used herein is the path through which the film is passed through a bag making machine or a winder, except for any area where the film can be accumulated for winding. An alternative film path as used herein includes one of the paths followed by the film or bag in a portion of the winder that is in use.

The alternative path is preferably primarily downwards, while allowing the rejected film or missed transfer film to be knocked back to the floor in a convenient location. The main downlinks used herein include being more vertical (with gravity) than horizontal. The mandrel is a fixed position mandrel. As used herein, a fixed position mandrel includes a mandrel that does not move from a position such as a track, but is rotatable.

When the mandrel is wound in a full roll in use, the leading end of the first bag of the next roll is guided along another alternative path to the other mandrel. Therefore, the winder can be immediately wound on another mandrel without moving the mandrels, and it is not necessary to remove one roll before winding the next roll.

Different embodiments use one or more of the following feature configurations, which may be used alone or in many combinations. Air may be used to guide the film as desired, and the roller may be activated using a protruding finger and/or an air angle member. The bag can be held to the mandrel by means of a fixed pin and the last bag end of a roll can be held to the roll by means of a bipolar fixing pin. The conveyor can be used to guide the film along an alternative path, and the conveyor can be changed with the roller Large and pivoted to accommodate the diameter of its growth. A paper strap can be used and because the glue can be dried while using another mandrel, it can accommodate the drying time of the glue. Because the mandrel is a fixed position mandrel, a push-off device can be used to remove the roller and can be wiped substantially 360 degrees along the circumference of the mandrel. The substantial 360 degree used herein is included above the complete circumference except for occasional small interruptions.

Referring now to Figure 2, there is shown a diagram of a winder 200 in accordance with a preferred embodiment. The winder 200 can be located downstream of the film path of the bag making machine 100 of Figure 1. Although many of the alternatives described above have been shown as set forth above, they need not be all included.

The film 201 is moved from a perforator or blade 218 (Fig. 1) to a feed nip defined between rollers 303 and 305 (Fig. 2), at least one of which is driven. The feed nip draws or feeds the film into the winder 200 (feed nips may refer to feeds to a implement or section. Also used herein to refer to the feed of the winding section).

The preferred embodiment provides vertical web feed through one of the feed nips. This allows the implement to be uni-handed with respect to an operator side and can accommodate left and right handed floor configurations.

The film 201 is provided to an overspeed nip defined between the rolls 307 and 309 after exiting the feed nip, at least one of the rolls 307 and 309 being driven (in different embodiments, the film 201 is leaving the feed) The nip is then provided directly or indirectly to other stations). Preferably, the overspeed system is servo driven and the user can easily change the overspeed percentage for a wide perforation repeat distance, such as from 10" to 250" without changing the components.

In an intermittent mode, the perforated membrane can be operated by operating the overspeed only after a particular count is completed and separating one of the plurality of pockets relative to their subsequent pockets. In a bag mode, it can be an overlay and run at any time. Overspeed to separate and overlap the bags (each bag mode consists of not separating several bags in each roll). The overspeed nip can assist in diverting the web to a suitable alternative path by not operating overspeed during the last pocket of the overlapped rolls. No perforation detection is required when separating the bag pieces (but can be provided).

An overlapper includes bars 311-315 that are mounted to be movable in a generally elliptical orbit that intersects the path of film 201 at two locations, preferably above and below the nip. The generally elliptical shape used herein includes a non-circular, non-angular path. The track is shown clockwise in Figure 2, in which the roller is wound onto a mandrel 337 whose position is placed along one of the alternative film paths. When a mandrel 338 (positioned along another alternative film path) is used, the rotor reverses direction and moves the bar in a counterclockwise direction. The rod pulls the membrane laterally and aids in separation, but can be separated by an overspeed nip alone if no overlap is provided. The rod temporarily accumulates the film to allow overlapping of subsequent pockets. The overlap is shown as 317 and 318, and 319 and 320.

Preferably, the rod member is a 0.5" diameter steel rod member supported on each end by a chain or timing belt including a driven sprocket and a tensioner sprocket, preferably driven by a servo. Reduces the distance the web is required to jump at unsupported locations. An air curtain or series of air nozzles can be used to help the membrane jump mechanically to overlap the gap created by the rod. Alternatives include the use of air for overlap and less use. Or more than one bar, using a different track, or other known overlap.

The overspeed rollers 307 and 309 preferably include a 0.25" wide groove that overlaps the faces of the two roller faces by 1" to provide clearance for the plurality of air nozzles 322-325 in each of the grooves. Air nozzles 322-325 can be used to direct the film to the desired mandrel. The upper air nozzles 322 and 323 are used to divert the web to the opposite rollers and utilize Lower air nozzles 324 and 325 divert the web down to a conveyor belt 327 or 328 adjacent one of the configurations along the membrane path. As shown in FIG. 3, the air nozzles 322 and 325 are turned off, and the air nozzles 323 and 324 are turned on to guide the film 201 toward the mandrel 317. When the membrane is directed toward the mandrel 318, the nozzles 322 and 325 are turned "on" and the nozzles 323 and 324 are turned "off".

When a roll is completed and the nozzle has guided the trailing edge of the roll to a mandrel, the nozzle is controlled to direct the leading edge of the next bag roll to the other mandrel. Thus, the nozzle alternately directs the membrane to one of the two paths. Path changes, or alternations, occur after a plurality of bags - one roll - are wound. If the separator is in a batch mode, the nozzles are alternated after separation. In each bag (overlap) mode, it alternates after a given count.

The preferred embodiment is such that the right and left mandrels and associated components are mirror images of each other, but this need not be the case. Thus, the mandrel 338 is wound counterclockwise and the mandrel 337 is wound clockwise.

The web, when moved to the mandrels 337 and 338, is preferably held against the conveyor belts 327 and 328 by a series of circular elastic cords. Also, an embodiment is such that the retaining pins 330 and 331 hold the membrane against the conveyor belts 227 and 228. The pin holders 330 and 331 can be bipolar pin holders to not only hold the film against the conveyor, but also attach the last leg end of a roll to the roll by closing the fixed neutral for the last few bags. Thus, the present invention can securely secure the tail of one of the last of the rolls to the roll to aid in manual handling of the roll, automatic handling of the roll, and reduce the need for the end of the last bag of glue.

The conveyor belts 227 and 228 are preferably a wide belt or a narrower belt having a series of 1" gaps therebetween. The gap can accommodate the protruding fingers 340, 341 (different There are one or more alternatives that help guide the leading edge of the first bag into an air corner piece 342, 343 and around the winding mandrel. The protruding fingers 340 and 341 are intermittently guiding the film near the mandrel and retracting after the first bag is transferred. The gap between the belts allows for the use of a hot melt tail to bond and the glue has less chance of getting on the conveyor belt.

The conveyor belt 328 is preferably mounted such that it pivots at one end of the feed nip as it grows in diameter and away from the stationary position mandrel 338, as indicated by the dashed line and arrow 345. A similar pivot is used for the transmitter 327.

Each winding station can have a paper strap 346, 347. Since a brace can be used while winding relative to the mandrel, two braceries each operating at 20 cpm allow the overall winder to cycle at 40 cpm. Also, because there are two winding stations each cycled at 20 cpm, the pneumatic device can be used with an overall speed of 40 cpm.

The mandrel preferably uses a prior art CMD® design Teflon® sleeve or bead/chrome design. Moreover, because the mandrel is a fixed position mandrel, it can use a simple push and unload device that does not require pivoting, and can wipe the substantial 360 degrees of the circumference of the mandrel to make it easier to remove the film with less chance of restraint. . The fixed position also allows for a simple air connection to the mandrel.

Because it has two stations with a cycle of 20 cpm (counts per minute), the machine runs at 40 cpm and has more time for roll inspection, picking, and rejection than the time allowed for a single station 40 cpm machine. Use.

An alternative embodiment of a winder 300 is shown in Figure 3 and can include many of the features described above, including two winding stations. Different embodiments may be combined as needed to select feature configurations from prior art or feature configurations that are tailored to the needs of a particular application.

Winder 300 includes a pair of feed rollers 403 and 405 A feed nip is interposed between a pair of rollers 407 and 409 to separate the controllable overspeed nip of adjacent pockets, and mandrels 437 and 438. In general, the operation of the winder 300 is identical to that of the winder 200 except as described below.

The film or web 201 approaches the feed nip by wrapping or following a portion of the surface of the roller 403 prior to reaching the nip. In various embodiments, the membrane system rides on an arc equal to or greater than 10, 45, 60 or 90 degrees.

A plurality of fixed film guides 412 mounted on the support member 410 are recessed into the rollers 403. Preferably, the surface of the guide 412 is flush with the surface of the roller 403 such that the web rides over the surface of the film guide, the cord (not shown), and the roller 403. As used herein, "indented in a roller" includes a recessed area that resides partially or completely on a roller. The recess can be a groove or passage and, in a preferred alternative embodiment, has a depth such that the web rides over both the membrane guide and the surface of the roller 403. The guide member 412 is preferably constructed of a metal having a slip coating and is tightly fitted into the recess of the roller 403, such as a gap on the side that is no greater than 0.010 inches. This allows the film to be in a flat configuration without being caught in the space between the recess and the guide 412.

Referring to Figure 5, an embodiment of the roller 403 is shown having a recess 501 for the membrane guide 412 and a recess 502 for the cord. This embodiment provides nine guides and two cords. Also, a plurality of air venting holes 505 (counter-hole type, 1/2" 吋 diameter multiplied by l/8" deep) are provided to help the film be flush disposed on the surface of the roller 403 (and the film guide 412, Not shown in Figure 5). There are corresponding holes (180 degrees from the hole 501) on opposite sides of the roller 403.

A film follows the surface of a roller when it rests substantially against the outer surface and does not require the film to conform to a recess or the like. The film guide used herein includes a structure for supporting and guiding the film without driving the film. a table of rollers used here The facets are substantially the same distance from the axis of the roller.

The film guide 412 can be extended in common with the arc of the roller 403 on which the film is seated before the nip, or it can be stretched more or less. Preferably, the film guide 412 and the arc have a sufficient range to support or contact the membrane 204 as it approaches the feed nip. The inventors have discovered that the fixation of the film guide, together with the nip from the side such that the film 201 passes over the guide 412, the rope (not shown) and the roller 403, allows for faster and more stable operation. .

The film guide 412 extends through the feed nip, but is recessed below the surface of the roller 403 closest to the film path on the nip (e.g., 1/16 inch), thereby allowing the feed nip to properly clamp the film. 201. The surface of the roller closest to one of the membrane paths used herein is the surface of the roller that is generally followed by the membrane. As used herein, a surface of a roller is referred to as closer to the roller axis than the surface of the roller that is in contact with the membrane.

A plurality of film guides 460 are coupled to the film guide 412 and mounted on a block 464. Film guides 412 and 460 can be considered as continuous film guides. A plurality of guides 462 are mounted on a block 466 and direct the film 201 from the opposite side of the film 201. The film guides 460 and 462 are preferably distributed enough to allow the film to pass easily, such as a total of 1/16 inch therebetween. Guides 460 and 462 are recessed into rollers 403, 405, 407, and 409 and are recessed below the surface at the feed and overspeed nips to avoid interference with the nip (e.g., 1/32 inch each). Film guides 412, 460, and 462 can be one or several individual guides.

The film is also moved by a cord that wraps around rollers 403 and 407 (and in one embodiment, 405 and 409). The cord is particularly helpful in driving the film, such as 6 micron high density polyethylene, but is omitted for some applications, especially for heavier films.

The preferred embodiment uses a cord that faces the center of the membrane, and a guide toward the edge to provide greater support. For example, for a six-inch omentum, use one with three membranes Guides 412 (both of which are adjacent to the edge of film 201, one located at the center), and a configuration 3 of two strands (each located between the film guides). Use more film guides for wider membranes (and/or use more than one rope as needed).

The winder 300 can be operated in a continuous mode or an overlap mode. In the overlap mode, the film 201 is separated into adjacent pockets by the overspeed rollers 407 and 409. The rollers 407 and 409 can be intermittently brought together or intermittently accelerated to separate the film 201 into pockets (other methods for separating adjacent pockets can also be used). Figure 3 shows a pocket member 201a that has been separated from the membrane 201. In a continuous mode, rollers 407 and 409 can be operated at film speed, remain separated, or act as idler rollers.

Guides 460 and 462 extend through the nip where the pockets are separated to assist film 201 in skipping the gap below rollers 407 and 409.

The overlap requires a slower movement downstream of the membrane and allows the excess membrane to be picked up during the overlap. The above embodiment (Fig. 2) shows a manner for separating the membrane and taking the membrane for overlap. Figure 3 shows another way of picking up excess film for overlap. At the downstream, in the overlap mode, the rollers 411 and 413 move the film more slowly than the rollers 403 and 405 (which operate at the same speed as the rollers 403 and 405 in the non-overlapping mode).

Air supply or air nozzles/tubes 404a and 406a (mounted on supports 404 and 406) divert the membrane from its path to pick up excess film when overlap occurs. As shown in Fig. 3, the nozzle 404a is active and deflects the film from the film path to the left, thereby taking in excess film. As used herein, steering from a film path means that the bag or film accumulates when the bag or film follows a path that is not the film path. The nozzle 404a partially guides the air at least in a crossing direction and faces the right side of the film of Fig. 3. Nozzle 406a also directs air at least partially in a cross direction, but to the opposite (left) side of the membrane. nozzle 404a and 406a can each be implemented with multiple nozzles, a single nozzle, and/or an air tube.

The pocket member 201a is then moved to a winding feed nip between the rollers 411 and 413 at a speed that is insufficient for overlap. The preferred embodiment requires that the speed be less than 20%. Ropes 411a and 413a are disposed around rollers 411 and 413 to help move and direct the membrane to one or more downstream conveyors 427/428.

Embodiments provide a single winding station. However, an alternative preferred embodiment of Fig. 3 provides two winding stations, each winding station having a mandrel 437/438, a conveyor 427/428 surrounding a roller 468.

After leaving the rollers 411 and 413, the pocket member 201a can be guided to the desired winding station by a rotating brush 416. The brush 416 is preferably a full width brush positioned to contact the strings 411a/413a and/or the belts 427/428 and is located in a first alternating mandrel in which the film path follows a to mandrel 437. The membrane path or a location of the second alternating mandrel path to the mandrel 438. Figure 3 shows that the overlapping pocket members 201a and 202b are leading to the winding station so that the brush 416 rotates clockwise. The preferred embodiment provides rollers that are alternately wound on mandrels 437 and 438.

After being properly guided by the brush 416, the pocket members 201a and 201b are guided through an optional pinch 422, an optional hot glue applicator 424, and an optional strap 426 (i.e., one for A station or device for applying a band of hoops along a roll of wrapped articles. A pair of air angle members 422/433 are used to facilitate activation of a roll. A pair of sorting trays 450/451 guides the wound rolls to In a compartment, or guided to the floor, depending on whether it is accepted or rejected. A pair of fingers/strippings 440 and 441 are configured to be close to the mandrel 437/438 to help remove the rejected bag Pieces and/or rejected rolls.

An example of a nester 426 is shown in Figure 4 and includes a conveyor 610 wrapped around a roller 612, a membrane guard 619, an air supply source 616, and an ampoule An air supply 608, mounted on the air angle member 343, cooperates with the conveyor 428 to wrap a web 601 around the pocket of a winding roller 618 on the mandrel 438 (Fig. 3). The brace 426 is shown as the left brace of Figure 3, and the right bundle will be a mirror image.

A roll of belt 601 is moved by conveyor 610 to roll 618, which passes over the top of roll 618. Nozzle 608 directs air to the web 601 and helps support the web (i.e., it does not fall until it reaches the roller 618). The guard 615 helps prevent the web 601 from wrapping around the conveyor 610 and the roller 612.

After the take-up reel 601 reaches the roller 618, the nozzle 616 directs air to force the web 601 down, around the right side of the roller 618, whereby the auxiliary web 601 is wrapped around the roller 618. As the web 601 is wound around the roll 618, the air from the nozzle 608 supports the web as it wraps around the bottom of the roll 618, thereby assisting the web 601 to wrap around the roll 618.

Nozzles 608 and 616 can each be a single nozzle, an air tube, or a plurality of nozzles each. Also, the nozzle 608 can be mounted on any support member and does not need to be located on the air angle member 433. Nozzle 616 can also be mounted on any support member.

Numerous modifications may be made to the invention without departing from the intended scope of the invention. Accordingly, it should be appreciated that a method and apparatus for manufacturing and winding a bag member that fully satisfies one of the above objects and advantages has been provided in accordance with the present invention. While the invention has been described in connection with the specific embodiments thereof, many modifications, modifications and variations are apparent to those skilled in the art. Therefore, it is intended to cover all alternatives, modifications and variations that fall within the spirit and scope of the invention.

426‧‧‧Selective strapping device

428,610‧‧‧transmitters

433‧‧‧Air corner pieces

601‧‧‧Reel

608,616‧‧‧air supply, nozzle

612‧‧‧ Roll

615‧‧‧ Guards

618‧‧‧Packet roll

Claims (5)

A strapping device for a bag making machine, comprising: a conveyor configured to transport a web to a mandrel, wherein the web passes from a first direction toward the mandrel and passes over the mandrel, and Surrounding a bag member wound around the mandrel; a first air supply source guided to support the web as the reel approaches the mandrel; and a second air supply a source that is directed to force the web around the pocket of the roller as the web passes over the mandrel, thereby assisting the webbing around the roller; wherein the first air supply is tied to it The web is supported while wrapping around the bag of the roll to assist the wrap to wrap around the roll. A bundling device of claim 1, wherein the first air supply is mounted on an air angle member configured to be movable toward and away from the mandrel. A method for binding a bag of a roll comprising: transferring a web from a first direction to a mandrel, moving the web over the mandrel, and one of the rolls wound along the mandrel Surrounding the bag member and wrapping the tape around; when the tape is approaching the mandrel, directing air from the tape to the tape to support the tape; and Air is directed from above to the web as the web passes over the mandrel, thereby assisting the web wrap around the roller; wherein the air that is guided from below to the web is wrapped around the web The roll supports the web vertically to assist the wrap around the roll. A strapping device for a bag making machine comprising: means for transporting a web from a first direction and a mandrel to the mandrel; for winding from the web as the web is approaching the mandrel Directly guiding air to the member of the web to support the web; and means for directing air from above to the web when the web passes over the roller to assist the web wrap a roller; wherein the means for directing air from below to the web further supports the web as it is wrapped around the roller, thereby assisting the web wrapping around the roller. A bundling device according to claim 4, wherein the means for guiding air from the underside to the reel is mounted on an air angle member configured to be movable toward and away from the mandrel.