CA1245236A - Bag stacking method and apparatus - Google Patents
Bag stacking method and apparatusInfo
- Publication number
- CA1245236A CA1245236A CA000485212A CA485212A CA1245236A CA 1245236 A CA1245236 A CA 1245236A CA 000485212 A CA000485212 A CA 000485212A CA 485212 A CA485212 A CA 485212A CA 1245236 A CA1245236 A CA 1245236A
- Authority
- CA
- Canada
- Prior art keywords
- segment
- pins
- segments
- stacking
- web
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/26—Auxiliary devices for retaining articles in the pile
-
- 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
- B31B70/92—Delivering
- B31B70/98—Delivering in stacks or bundles
- B31B70/984—Stacking bags on wicket pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/191—Bags, sachets and pouches or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
- Pile Receivers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Discharge By Other Means (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Disclosed is stacking arrangement for accumulating a plurality web segments of substantially identical dimensions on sharpened pins projecting upwardly from a support plate located at a stacking station. As each web segment is produced, it is firmly held or grasped on opposite sides of its medial area and impalled on and penetrated in the medial area by the sharpened pins. Release of the segment from the grasping force occurs after the segment has been penetrated by the pins.
Disclosed is stacking arrangement for accumulating a plurality web segments of substantially identical dimensions on sharpened pins projecting upwardly from a support plate located at a stacking station. As each web segment is produced, it is firmly held or grasped on opposite sides of its medial area and impalled on and penetrated in the medial area by the sharpened pins. Release of the segment from the grasping force occurs after the segment has been penetrated by the pins.
Description
~ 5%36 BAG STACKING METHOD ~ND APPARAT~S
Tha present invention relates to a method and apparatus for stacking thermoplastic bags and more particularly to stacking bags on sharpened pins that penetrate the web materialO
The subject matter of the present invention is related in substantial respect to the subject matter disclosed in Canadian Patent ~,161,679 issued February 7, 1984 and in Canadian Patent Application S.N. 461,154 filed on August 16, 1984 which are owned by the assignee of this present invention.
The disclosure of the referenced patent describes a bag production technique whereby an elongate strip of tubular thermoplastic material is provided with two or more holes adjacent its longitudinal median. At regularly spaced intervals the web is severed and sealed to define a generally rectangular web portion which is referred to as a web segment. Each segment contains at least one hole on opposite sides of the longitudinal median serving to be received on pins carried by a stacking device which is part of a wicket conveyor. Each segment, as it is produced is transferred in an arcuate path to the stacking device.
The subject matter of the present invention has particular utility if it is desired to produce bags, while of the same type disclosed in a referenced patent, but without providing holes in each web segment.
Stacking is achieved by substituting sharpened pins on each of the stacking plates carried by the wicket conveyor so that web segments transferred for stacking are pierced and collected on the stacking device. Thus the web segments need not be provided with holes and any resistance encountered in piercing ~he web segments is overcome by the manner in which a conventional vacuum arm transfer device is valved to retain a firm grip on each web segment until the segment has been pierced by the sharpened pin.
In an apparatus, according to an aspect of this invention, for manufacturing thermoplastic bags, from a ~24523~
roll of tubular thermoplastic web material, of the type comprising means for removing a narrow longitudinally extPnding median strip from one web ply, means for sealing and severing the web transversely with respect to the median strip thereby forming a segment of a generally rectangular configuration, and a rotary transfer means for transferring and stacking individual formed segments in succession on at least one pair of upright pins mounted to a stacking plate, the lateral sides of the segment draping over the stacking plate, wherein the improvement comprises the punching of mounting holes in the segmsnt by the force of the rotary transfer means depositing the segment on the pins through the other web ply in the area facing the open median strip in the one web ply, each pin having a sharpened conical shaped head projecting upwardly from a cylindrical shaft mounted to the stacking plate, each shaft having a diameter substantially less than the diameter at the base of the conical shaped head thereby facilitating the downward sliding of the pierced segment beyond the base of the conical shaped head without appreciable force applied by the rotary transfer means.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 is diagrammatic elevation of a major portion of a bag making and stacking machine incorporating the novel subject matter of the present invention;
Figure 2 is a diagrammatic perspective showing one form the web segment can take and the cooperation of a seal bar and platen roll to produce a web segment;
Figure 3 is a diagrammatic prospective illustrating the accumulation of a plurality of web segments and a web segment which has been pierced by pins;
Figures 4, 5 and 6 illustrate the sequence of events occurring when a web segment is adjacent the upper end of the sharpen pins, the deformation of the web as the pins impart perforating stresses and piercing of a web segment;
~5%3~
Figure 7 is a plan of a stacking plate carrying a group of accumulated web segments;
Figure ~ is an elevation of a web segment cutting station;
Figure 9 is a plan of a modified stacking plate provided with two stacking pins, and Figure 10 and 11 are, respectively, an elevation and plan of a modified cutting device and a stacking plate wherein stacking pins are located on a medial line and the cutting knife is relieved or slotted.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figure 1, which is similar in substantial respects in construction and mode of operation to the subject matter disclosed in the 1,161,679 patent will be described to merely point out the major components and their organization so that the novel subject matter of the present invention may be described in contsxt. The overall machine, generally indicated by the numeral 10, and its major components comprise a base plate 12 supporting a unwind stand 14 mounting for free or controlled rotation a roll of thermoplastic materials 16. The unwound strip 18 passes over a plurality of idle rolls, collectively identi~ied as 20, and over upper and lower sets of idle rolls 22 and 24 carried by tower structure 26. While not shown, the idler rolls 24 are mounted for upward and downward vertical movement and serve to accumulate and provide a proper amount of tension to the web strip 18. The tower structure also is provided gusseting devices 28 to form inward folds to the web strip. After passing through web drive rolls 30 and another accumulatiny and tensioning devic~ 32, the web strip 18 is intermittently advanced by draw rolls 34 serving to project a selective length of a web strip beyond a platen roll 36 and an oppositely disposed heated seal bar 38. As is conventional in the art, the time period for a draw roll rotation is determined by the length of the web strip 18 which is projected beyond (from right to left as used in Figure 1) the seal bar. On arresting the draw roll ~2g6~
rotation the seal bar 3~3, which is elevated during web advance, is lowered in pressure engagement with the seal roll and accordingly the leading portion of the web, indicated by the numeral 40, is severed and sealed thereby defining a web segment 42 shown in Figures 2 and 3.
The leading portion of the web 40 projected beyond the seal bar 38 is laterally supported by a series of belts 44 traveling in a generally triangular path defined by a plurality of rollers 46.
A rotary transf~r mechanism 48 comprising a plurality of radially extending circumferentially spaced hollow bars or arms 50, having their inner ends rigidly connected a split hubs 52 and rotating about the axis of shaft 54, and trans~er the leading portion of the severed web 40 in an arcuate path for collection on a conveyor 56 which comprises a plurality of stacking plates or devices 58 each of which mount upwardl~
extending sharpened pins 60.
As shown in Figure 3, the transfer mechanism 48 includes two hubs 52 axially spaced on the shaEt 54 and each hub mounts a set of radially extending circumferentially spaced hollow arms or bars 50. As is conventional the stationary portion of the split hubs 52 is connected to a source of vacuum (not shown~
communicating with each of the areas 50 which are secured to the rotating half of the split hubs. Each of the arms 50 is provided with a series of small diameter holes 62 on the face of the bars that come into to contact the leading portion of the web 40 and thereby the web portion is grasped due to blocking of ths holes 62. The grasped web segment is transferred in an arcuate path to one of the stacking plates 58 located at a stacking station SS.
Figure 2 shows, in greater detail, the relationship of the seal bar 38 and the platen roll 36.
When the seal bar 38 comes into pressure engagement with the platen roll the leading portion 40 of the web 18 is severed and sealed to producs the web segment 42.
5~
It is to be understood however, that as soon as the leading portion of the web 40 is severed and sealed it is engaged by a pair of opposed bars 50 and transferred as mentioned above.
Reference to Figure 3 will reveal accumulation of a plurality of web segments 42 on a stacking plate positioned at the stacking station SS. It also should be noted that the web segment 42, shown in Figure 2, has its central zone 42a free of holes or perforations in contrast with preparation of the web segment as disclosed in the referenced 1,161,679 patent. Figure 3 shows the stacking plate 58 provided with four upwardly projecting pins 60 having their upper ends sharpened such as to take the form of a pencil point so that as the web segment 42 carried by the arms 50 approach the stacking plate 58 the pins 60 pierce the web and accordingly the stack of web segments assume a registered orientation; meaning that the stack of web segments overlie each other such that corresponding edges are even. It is to be recognized that vacuum to the arms 50 is maintained to a sufficient level to firmly hold the web segments 42 until the resistance of the film, or web to puncturing by the pins 60 has been overcome.
With reference now to Figures 4, 5 and 6 the progressive action involved in piercing and plunging a web segment 42 on the pins 60 is illustrated. If desired, the elevation of the pins 60 from the plate 58 can be made so that the upper tips of the pins 60 concurrently engage the web segment 42 and therefore all pins penetrate the webs at the same time. It should be recognized however that the pins can be made the same elevation such that penetration occurs sequentially rather than concurrently. Figure 5 illustrates deformation of the web by the tips of the pins 60 while Figure 6 shows the web penetrat~d by the pins. As ~" indicated above the vacuum supplied to the bars 50 is maintained until the web segment 42 is pressed ~2~523Ç~
downwardly onto the surface of the plate 58 or the surface of previously stacked segments.
The piercing stacking pins 60 are formed with a conical point 62a and a transition radius 62b blending the base or the conical point 62a with a smaller diameter shank 62c. Providing a shank 62c of smaller diameter than the diameter of the base of the cone 62a facilitates producing a compact stack of web segments since the diamstar of the hole produced by the pins 60 is substantially equal to the diameter of the base of the cone 62a which is somewhat greater than the diameter of the shank 62c. In this way after the web segment was progressed beyond the base of the cone 62a stacking is facilitated as there is no resistance to being compactly stacked against the plate 58 or previously stacked segments.
After a selected number of web segments have been stacked on a particular stacking plate 58, the conveyor is indexed (from right to left as viewed in Figure 1) toward a cutting or a cutting and sealing mechanism 72 ; which comprises a frame structure 74 supporting a pair of concurrently operable linear actuators 76 having their output rods 76a connected to a knife or other suitable cutting element 78 serving to cut or cut and combine a stack of web segments located thereunder along the imaginary line 80 shown in Figure 7. It will be noted that the knife is projected between the pins 60 whereby cutting along the line 80 produces two bag stacks which are retained on the conveyor until unloading or removal occurs.
As shown in Figure 8 the rods 76a of the actuators 76 are connected to a cross head 82 which in turn has rigidly attached thereto by any suitable means such as fasteners 84 the knife 7~. In order to maintain the integrity or life of the edge 78a of the knife 7B a deformable insert 86, which may be a strip of wood, is affixed to the plate 58 and forcibly engaged by the knife edge 78a in the course of dividing the stack of web segments into individual bag stacks.
5;~36 Figure 9 shows a modification whereby each plate 58 mounts two pins 60 located on either side of the imaginary parting line 80. Figures 10 and 11 illustrate in a modified form wherein thP pins 60 are located on the imaginary line 80 and that the knife 78, by being formed with slots 88, to provide clearance for the pins 60, cuts the web segments along the line 80 but with interrupted uncut portions corresponding to the slots 88. If one chose to produce bag stacks be using the construction shown in Figures 10 and the portion of the web material that can be allocated to define the volume of the bag would be increased.
Although the best mode contemplated for carrying out the present invention has been herein shown and described, it will be apparent that modification and variation may be made without departing from what is regarded to be the subject matter of the invention.
Tha present invention relates to a method and apparatus for stacking thermoplastic bags and more particularly to stacking bags on sharpened pins that penetrate the web materialO
The subject matter of the present invention is related in substantial respect to the subject matter disclosed in Canadian Patent ~,161,679 issued February 7, 1984 and in Canadian Patent Application S.N. 461,154 filed on August 16, 1984 which are owned by the assignee of this present invention.
The disclosure of the referenced patent describes a bag production technique whereby an elongate strip of tubular thermoplastic material is provided with two or more holes adjacent its longitudinal median. At regularly spaced intervals the web is severed and sealed to define a generally rectangular web portion which is referred to as a web segment. Each segment contains at least one hole on opposite sides of the longitudinal median serving to be received on pins carried by a stacking device which is part of a wicket conveyor. Each segment, as it is produced is transferred in an arcuate path to the stacking device.
The subject matter of the present invention has particular utility if it is desired to produce bags, while of the same type disclosed in a referenced patent, but without providing holes in each web segment.
Stacking is achieved by substituting sharpened pins on each of the stacking plates carried by the wicket conveyor so that web segments transferred for stacking are pierced and collected on the stacking device. Thus the web segments need not be provided with holes and any resistance encountered in piercing ~he web segments is overcome by the manner in which a conventional vacuum arm transfer device is valved to retain a firm grip on each web segment until the segment has been pierced by the sharpened pin.
In an apparatus, according to an aspect of this invention, for manufacturing thermoplastic bags, from a ~24523~
roll of tubular thermoplastic web material, of the type comprising means for removing a narrow longitudinally extPnding median strip from one web ply, means for sealing and severing the web transversely with respect to the median strip thereby forming a segment of a generally rectangular configuration, and a rotary transfer means for transferring and stacking individual formed segments in succession on at least one pair of upright pins mounted to a stacking plate, the lateral sides of the segment draping over the stacking plate, wherein the improvement comprises the punching of mounting holes in the segmsnt by the force of the rotary transfer means depositing the segment on the pins through the other web ply in the area facing the open median strip in the one web ply, each pin having a sharpened conical shaped head projecting upwardly from a cylindrical shaft mounted to the stacking plate, each shaft having a diameter substantially less than the diameter at the base of the conical shaped head thereby facilitating the downward sliding of the pierced segment beyond the base of the conical shaped head without appreciable force applied by the rotary transfer means.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 is diagrammatic elevation of a major portion of a bag making and stacking machine incorporating the novel subject matter of the present invention;
Figure 2 is a diagrammatic perspective showing one form the web segment can take and the cooperation of a seal bar and platen roll to produce a web segment;
Figure 3 is a diagrammatic prospective illustrating the accumulation of a plurality of web segments and a web segment which has been pierced by pins;
Figures 4, 5 and 6 illustrate the sequence of events occurring when a web segment is adjacent the upper end of the sharpen pins, the deformation of the web as the pins impart perforating stresses and piercing of a web segment;
~5%3~
Figure 7 is a plan of a stacking plate carrying a group of accumulated web segments;
Figure ~ is an elevation of a web segment cutting station;
Figure 9 is a plan of a modified stacking plate provided with two stacking pins, and Figure 10 and 11 are, respectively, an elevation and plan of a modified cutting device and a stacking plate wherein stacking pins are located on a medial line and the cutting knife is relieved or slotted.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figure 1, which is similar in substantial respects in construction and mode of operation to the subject matter disclosed in the 1,161,679 patent will be described to merely point out the major components and their organization so that the novel subject matter of the present invention may be described in contsxt. The overall machine, generally indicated by the numeral 10, and its major components comprise a base plate 12 supporting a unwind stand 14 mounting for free or controlled rotation a roll of thermoplastic materials 16. The unwound strip 18 passes over a plurality of idle rolls, collectively identi~ied as 20, and over upper and lower sets of idle rolls 22 and 24 carried by tower structure 26. While not shown, the idler rolls 24 are mounted for upward and downward vertical movement and serve to accumulate and provide a proper amount of tension to the web strip 18. The tower structure also is provided gusseting devices 28 to form inward folds to the web strip. After passing through web drive rolls 30 and another accumulatiny and tensioning devic~ 32, the web strip 18 is intermittently advanced by draw rolls 34 serving to project a selective length of a web strip beyond a platen roll 36 and an oppositely disposed heated seal bar 38. As is conventional in the art, the time period for a draw roll rotation is determined by the length of the web strip 18 which is projected beyond (from right to left as used in Figure 1) the seal bar. On arresting the draw roll ~2g6~
rotation the seal bar 3~3, which is elevated during web advance, is lowered in pressure engagement with the seal roll and accordingly the leading portion of the web, indicated by the numeral 40, is severed and sealed thereby defining a web segment 42 shown in Figures 2 and 3.
The leading portion of the web 40 projected beyond the seal bar 38 is laterally supported by a series of belts 44 traveling in a generally triangular path defined by a plurality of rollers 46.
A rotary transf~r mechanism 48 comprising a plurality of radially extending circumferentially spaced hollow bars or arms 50, having their inner ends rigidly connected a split hubs 52 and rotating about the axis of shaft 54, and trans~er the leading portion of the severed web 40 in an arcuate path for collection on a conveyor 56 which comprises a plurality of stacking plates or devices 58 each of which mount upwardl~
extending sharpened pins 60.
As shown in Figure 3, the transfer mechanism 48 includes two hubs 52 axially spaced on the shaEt 54 and each hub mounts a set of radially extending circumferentially spaced hollow arms or bars 50. As is conventional the stationary portion of the split hubs 52 is connected to a source of vacuum (not shown~
communicating with each of the areas 50 which are secured to the rotating half of the split hubs. Each of the arms 50 is provided with a series of small diameter holes 62 on the face of the bars that come into to contact the leading portion of the web 40 and thereby the web portion is grasped due to blocking of ths holes 62. The grasped web segment is transferred in an arcuate path to one of the stacking plates 58 located at a stacking station SS.
Figure 2 shows, in greater detail, the relationship of the seal bar 38 and the platen roll 36.
When the seal bar 38 comes into pressure engagement with the platen roll the leading portion 40 of the web 18 is severed and sealed to producs the web segment 42.
5~
It is to be understood however, that as soon as the leading portion of the web 40 is severed and sealed it is engaged by a pair of opposed bars 50 and transferred as mentioned above.
Reference to Figure 3 will reveal accumulation of a plurality of web segments 42 on a stacking plate positioned at the stacking station SS. It also should be noted that the web segment 42, shown in Figure 2, has its central zone 42a free of holes or perforations in contrast with preparation of the web segment as disclosed in the referenced 1,161,679 patent. Figure 3 shows the stacking plate 58 provided with four upwardly projecting pins 60 having their upper ends sharpened such as to take the form of a pencil point so that as the web segment 42 carried by the arms 50 approach the stacking plate 58 the pins 60 pierce the web and accordingly the stack of web segments assume a registered orientation; meaning that the stack of web segments overlie each other such that corresponding edges are even. It is to be recognized that vacuum to the arms 50 is maintained to a sufficient level to firmly hold the web segments 42 until the resistance of the film, or web to puncturing by the pins 60 has been overcome.
With reference now to Figures 4, 5 and 6 the progressive action involved in piercing and plunging a web segment 42 on the pins 60 is illustrated. If desired, the elevation of the pins 60 from the plate 58 can be made so that the upper tips of the pins 60 concurrently engage the web segment 42 and therefore all pins penetrate the webs at the same time. It should be recognized however that the pins can be made the same elevation such that penetration occurs sequentially rather than concurrently. Figure 5 illustrates deformation of the web by the tips of the pins 60 while Figure 6 shows the web penetrat~d by the pins. As ~" indicated above the vacuum supplied to the bars 50 is maintained until the web segment 42 is pressed ~2~523Ç~
downwardly onto the surface of the plate 58 or the surface of previously stacked segments.
The piercing stacking pins 60 are formed with a conical point 62a and a transition radius 62b blending the base or the conical point 62a with a smaller diameter shank 62c. Providing a shank 62c of smaller diameter than the diameter of the base of the cone 62a facilitates producing a compact stack of web segments since the diamstar of the hole produced by the pins 60 is substantially equal to the diameter of the base of the cone 62a which is somewhat greater than the diameter of the shank 62c. In this way after the web segment was progressed beyond the base of the cone 62a stacking is facilitated as there is no resistance to being compactly stacked against the plate 58 or previously stacked segments.
After a selected number of web segments have been stacked on a particular stacking plate 58, the conveyor is indexed (from right to left as viewed in Figure 1) toward a cutting or a cutting and sealing mechanism 72 ; which comprises a frame structure 74 supporting a pair of concurrently operable linear actuators 76 having their output rods 76a connected to a knife or other suitable cutting element 78 serving to cut or cut and combine a stack of web segments located thereunder along the imaginary line 80 shown in Figure 7. It will be noted that the knife is projected between the pins 60 whereby cutting along the line 80 produces two bag stacks which are retained on the conveyor until unloading or removal occurs.
As shown in Figure 8 the rods 76a of the actuators 76 are connected to a cross head 82 which in turn has rigidly attached thereto by any suitable means such as fasteners 84 the knife 7~. In order to maintain the integrity or life of the edge 78a of the knife 7B a deformable insert 86, which may be a strip of wood, is affixed to the plate 58 and forcibly engaged by the knife edge 78a in the course of dividing the stack of web segments into individual bag stacks.
5;~36 Figure 9 shows a modification whereby each plate 58 mounts two pins 60 located on either side of the imaginary parting line 80. Figures 10 and 11 illustrate in a modified form wherein thP pins 60 are located on the imaginary line 80 and that the knife 78, by being formed with slots 88, to provide clearance for the pins 60, cuts the web segments along the line 80 but with interrupted uncut portions corresponding to the slots 88. If one chose to produce bag stacks be using the construction shown in Figures 10 and the portion of the web material that can be allocated to define the volume of the bag would be increased.
Although the best mode contemplated for carrying out the present invention has been herein shown and described, it will be apparent that modification and variation may be made without departing from what is regarded to be the subject matter of the invention.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In an apparatus for manufacturing thermoplastic bags, from a roll of tubular thermoplastic web material, of the type comprising means for removing a narrow longitudinally extending median strip from one web ply, means for sealing and severing the web transversely with respect to the median strip thereby forming a segment of a generally rectangular configuration, and a rotary transfer means for transferring and stacking individual formed segments in succession on at least one pair of upright pins mounted to a stacking plate, the lateral sides of the segment draping over the stacking plate, wherein the improvement comprises the punching of mounting holes in the segment by the force of the rotary transfer means depositing the segment on the pins through the other web ply in the area facing the open median strip in the one web ply, each pin having a sharpened conical shaped head projecting upwardly from a cylindrical shaft mounted to the stacking plate, each shaft having a diameter substantially less than the diameter at the base of the conical shaped head thereby facilitating the downward sliding of the pierced segment beyond the base of the conical shaped head without appreciable force applied by the rotary transfer means.
2. The apparatus according to claim 1, and further including means for transporting the stacking plate and the draping segments stacked thereon after a selected number of segments are pinned on the conical headed pins to a means for producing two bags from each segment in the stack and comprising a serrated cutting element positioned above the selected number of draping segments pinned to the conical headed pins on the stacking plate transported thereunder by the transporting means, and power means for moving the serrated cutting element downwardly for perforating the stack of segments along a longitudinal centerline extending along the open median strip and producing a line of easy subsequent separation of the two stack of bags mounted on the conical headed pins.
3. The apparatus according to claim 2 wherein two pairs of longitudinally and laterally spaced apart conical headed stacking pins are mounted on the stacking plate and positioned for piercing the segment on the opposite sides of the centerline extending through the open median strip of the segment.
4. The apparatus according to claim 2, wherein the one pair of conical headed stacking pins mounted on the stacking plate are longitudinally spaced apart and positioned for piercing the segment along the centerline extending through the open median strip of the segment.
5. The apparatus according to claim 4, wherein the cutting element comprises a sectioned knife means for providing spaces for clearing the conical headed stacking pins aligned on the centerline of the open median strip perforating the layer of stacked web segments and for providing uncut spaces around the pins for holding the two stacks of bags on the conical headed pins.
6. The apparatus according to claim 3, wherein the cutting element comprises a knife means having an interrupted cutting edge for producing a series of incisions and uncut bond portions, and the stacking plate is provided with a resilient pad vertically aligned below the interrupted cutting edge for use in protecting the cutting edge following the perforation of the stack of segments.
7. The apparatus according to claim 5, wherein the sectioned knife means is provided with interrupted cutting edges for producing a series of incisions and uncut bond portions, and the stacking plate is provided with a resilient pad vertically aligned below the interrupted cutting edges for protecting the cutting edges following the perforation of the stack of segments.
8. In an apparatus for manufacturing thermoplastic bags, a method for transferring non-apertured generally rectangular web segments produced from a roll of tubular thermoplastic material to a stacking station for accumulating the transferred segments in a stack, comprising the steps of grasping each segment on lateral sides of a medial zone by a pair of rotary arms having grasping means connected to a controlled source of vacuum, rotating the rotary arms and transferring the grasped segment in an arcuate path to the stacking station and impaling the segment over at least one pair of sharpened conical headed stacking pins having cylindrical shanks of a diameter substantially less than the diameter of the base of the conical headed portion, puncturing the medial zone of the segment by the conical headed pins in the course of stacking the sheet on said accumulating device, and maintaining the grasp of the grasping means at least until the rotary arms have moved beyond the base of the conical headed portion.
9. The method according to claim 8 further including the steps of accumulating a selected number of successive segments on the cylindrical shank below the base of conical head portion, transferring the selected number of accumulated segments to a perforating station having a cutting element, and perforating the stack of segments with the cutting element and producing a series of incisions and uncut bond portions along a centerline extending through the medial zone.
10. The method according to claim 8 wherein one pair of conical headed pins penetrate and puncture the segment on the centerline extending through the medial zone, and including the step of perforating the stack of segments and producing a line of cut and uncut bond portions in a vertical plane containing the axes of the pair of conical headed pins defining two stacks of bags mounted on opposite sides of the vertical plane on the airs of conical headed pins.
11. The method according to claim 8 wherein two pairs of conical headed pins penetrate and puncture the segment on opposite sides of the centerline extending through the medial zone thereof, and including the step of perforating the stack of segments with a series of incisions and uncut bond portions along the centerline extending through the medial zone to define two stacks of bags mounted to the two pairs of conical headed pins on opposite sides of the centerline.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65458684A | 1984-09-26 | 1984-09-26 | |
| US654,586 | 1984-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1245236A true CA1245236A (en) | 1988-11-22 |
Family
ID=24625457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000485212A Expired CA1245236A (en) | 1984-09-26 | 1985-06-25 | Bag stacking method and apparatus |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS6181356A (en) |
| AU (1) | AU571984B2 (en) |
| BE (1) | BE903298A (en) |
| CA (1) | CA1245236A (en) |
| DE (1) | DE3524675A1 (en) |
| ES (1) | ES8700207A1 (en) |
| FR (1) | FR2570687B1 (en) |
| GB (1) | GB2164924B (en) |
| IT (1) | IT1185368B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1291771C (en) * | 1986-11-03 | 1991-11-05 | Rene F. Debin | Zero cycle interrupt wicket stacker |
| DE3823009A1 (en) * | 1988-07-07 | 1990-01-11 | Lehmacher & Sohn Masch | DEVICE FOR STACKING AND, IF NECESSARY, BLOCKING PLASTIC BAGS |
| MX2019004768A (en) * | 2016-10-27 | 2019-07-01 | Lemo Maschb Gmbh | Improvement in flap bag production. |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1561974A1 (en) * | 1967-03-02 | 1970-05-21 | Hugo Brennenstuhl | Device for stacking packaging material or the like. |
| US3555977A (en) * | 1967-04-13 | 1971-01-19 | Schjeldahl Co G T | Wicket loader |
| GB1316670A (en) | 1970-07-29 | 1973-05-09 | Ross A L | Perforator means |
| GB1434395A (en) * | 1972-07-03 | 1976-05-05 | Joice R L | Stacking machine |
| US3791267A (en) * | 1972-11-27 | 1974-02-12 | Aberdeen Bag Co | Method and apparatus for making packages of interconnected plastic bags and the like |
| ZA764252B (en) | 1976-07-16 | 1978-01-25 | T Hutt | Method and apparatus for processing synthetic plastics film |
| JPS55107421A (en) * | 1979-02-14 | 1980-08-18 | Nippon Furuuto Kk | Fusion welding and binding method for sheet-like body |
| DE7908492U1 (en) * | 1979-03-26 | 1979-07-05 | Ver Papierwarenfab Gmbh | Stack of bags |
| DE2924106A1 (en) * | 1979-06-15 | 1980-12-18 | Hans Lehmacher | METHOD AND DEVICE FOR PRODUCING BAGS FROM THERMOPLASTIC PLASTIC FILM |
| US4342564A (en) * | 1979-06-15 | 1982-08-03 | Hans Lehmacher | Apparatus for the stacking and connection of synthetic-resin foil bags |
| JPS5813339B2 (en) * | 1979-08-31 | 1983-03-12 | 東洋食品機械株式会社 | A device that stacks bags by pushing them into pins |
| DE7926375U1 (en) * | 1979-09-17 | 1981-07-16 | Schrader Kunststoff GmbH, 3470 Höxter | Package intended for hanging on a trough bracket from a large number of stacked plastic film bags one behind the other for packaging fruit vegetables or the like |
| US4451249A (en) * | 1980-09-26 | 1984-05-29 | Debin Rene F | Manufacture of thermoplastic bags |
| DE3211217A1 (en) * | 1982-03-26 | 1983-10-06 | Franz Bendig | METHOD AND DEVICE FOR PRODUCING AND STACKING BAGS FROM THERMOPLASTIC PLASTIC FILM |
| DE3216504C1 (en) * | 1982-05-03 | 1983-10-13 | Windmöller & Hölscher, 4540 Lengerich | Apparatus for the stacking of flat articles |
-
1985
- 1985-06-25 CA CA000485212A patent/CA1245236A/en not_active Expired
- 1985-07-10 DE DE19853524675 patent/DE3524675A1/en active Granted
- 1985-07-12 AU AU44870/85A patent/AU571984B2/en not_active Ceased
- 1985-07-17 JP JP60156201A patent/JPS6181356A/en active Pending
- 1985-08-06 GB GB08519673A patent/GB2164924B/en not_active Expired
- 1985-09-23 IT IT22242/85A patent/IT1185368B/en active
- 1985-09-24 BE BE0/215626A patent/BE903298A/en not_active IP Right Cessation
- 1985-09-25 FR FR8514208A patent/FR2570687B1/en not_active Expired
- 1985-09-25 ES ES547267A patent/ES8700207A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE903298A (en) | 1986-01-16 |
| GB2164924A (en) | 1986-04-03 |
| ES547267A0 (en) | 1986-10-16 |
| GB2164924B (en) | 1988-06-02 |
| AU4487085A (en) | 1986-04-10 |
| ES8700207A1 (en) | 1986-10-16 |
| FR2570687B1 (en) | 1989-07-28 |
| IT1185368B (en) | 1987-11-12 |
| AU571984B2 (en) | 1988-04-28 |
| GB8519673D0 (en) | 1985-09-11 |
| FR2570687A1 (en) | 1986-03-28 |
| JPS6181356A (en) | 1986-04-24 |
| DE3524675C2 (en) | 1992-07-02 |
| DE3524675A1 (en) | 1986-04-03 |
| IT8522242A0 (en) | 1985-09-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |