CA2082055A1 - Method and apparatus for the strapping of packages or stacks by using tape of heat-sealable plastic - Google Patents
Method and apparatus for the strapping of packages or stacks by using tape of heat-sealable plasticInfo
- Publication number
- CA2082055A1 CA2082055A1 CA 2082055 CA2082055A CA2082055A1 CA 2082055 A1 CA2082055 A1 CA 2082055A1 CA 2082055 CA2082055 CA 2082055 CA 2082055 A CA2082055 A CA 2082055A CA 2082055 A1 CA2082055 A1 CA 2082055A1
- Authority
- CA
- Canada
- Prior art keywords
- tape
- heat
- strapping
- loop
- package
- 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
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B13/00—Bundling articles
- B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
- B65B13/24—Securing ends of binding material
- B65B13/32—Securing ends of binding material by welding, soldering, or heat-sealing; by applying adhesive
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Abstract
ABSTRACT
A method of strapping packages or stacks, using tape (4) of heat-sealable plastic withdrawn from a supply roll comprising the steps of in which the starting end (5) of holding a starting end of the tape in the vicinity of the rear lower corner of a package or stack (1), advancing said package against a tensioned strap portion (8) of the tape (4), parallel to the bottom of said package or stack; guiding said starting end (5) of the tape (4) around the package or stack (1) pulling a loop (17, 18) parallel to an initial region (21) of the strapping tape (4), the part (17) heat sealing a portion of the tape which travels in the direction of advance and overlaps the initial region (21) to the initial region (21); and cutting the strapping of the package or stack (1) which is thus closed from the rest of the tape (4), characterized by the fact that shortly before, during or after the heat-sealing the strapping is cut off from the rest of the tape (4) at the end of the loop (17, 18) which extends in a direction opposite the direction of advance and both parts of the loop are pressed together and heat-sealed to each other and to the initial region (21).
A method of strapping packages or stacks, using tape (4) of heat-sealable plastic withdrawn from a supply roll comprising the steps of in which the starting end (5) of holding a starting end of the tape in the vicinity of the rear lower corner of a package or stack (1), advancing said package against a tensioned strap portion (8) of the tape (4), parallel to the bottom of said package or stack; guiding said starting end (5) of the tape (4) around the package or stack (1) pulling a loop (17, 18) parallel to an initial region (21) of the strapping tape (4), the part (17) heat sealing a portion of the tape which travels in the direction of advance and overlaps the initial region (21) to the initial region (21); and cutting the strapping of the package or stack (1) which is thus closed from the rest of the tape (4), characterized by the fact that shortly before, during or after the heat-sealing the strapping is cut off from the rest of the tape (4) at the end of the loop (17, 18) which extends in a direction opposite the direction of advance and both parts of the loop are pressed together and heat-sealed to each other and to the initial region (21).
Description
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METHOD AND APPAI~TUS FOl~ TI-XE STI~APPING OF PACKAGES
Ol~ STACKS BY USING TAPE OF`HEAT-SE~I,ABI,l~ PLASTIC
The present invention relates to a strapping machine and a method of strapping packages or stacks.
Methods and strapping machines are disclosed in Federal Republic of Germany 39 lg 674. In the l~lown method, the upper part of the loop formed by the loop puller, adjacent to the initial region of the strapping, is heat-sealed to the initial region of the strapping by means of a heatillg tongue and pressure jaws. The strapping which is closed in this manner is separated from the rest of the tape on the side of the heat-sealill, device WhiCIl iS in the direction of feed after the gripper has previously gripped the new starting end of the tape. In this method, it is necessary that the gripper which grips the corresponding starting end of the tape be moved upon each operating cycle from the side of the heat-sealing device which is in the direction of feed to the other side of the device and turned 360.
The object of the invention is to provide a method of strapping packages 20 ~ or stacks, in particular, stacks of newspaper, in which movement of a gripper from a position in front of the heat-sealing device into a position behind the heat-sealing device is not necessary. I
Another object of the invention is to provide a machine for the strapping of packages or stacks which, at little expense for machinery and with high reliability of 25 operation, can, in rapid sequence, wrap packages or stacks which are advanced along a conveyor path.
The use of an ultrasonic heat-sealing head has the advantage over a heating tongue in that it is immediately ready for operation without the need for preheating. An - ultrasonic heat-sealing head rapidly and dependably seals the two layers of the initial 30 region of the strapping which lies against the backing plate and the loop folded on the i .
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ultrasonic heat-sealing he~d to the s~rting region of the sLr~pping. By the double overlap of the in;tial region of the strapping by the folded loop, the result is~t~ jarts or layers of th~ loop can rcst snugly against the bottom of the package or stack and there is no elld ~vl~icll pro~rudcs rrom Lhe package or stacl; wllicll can lead to injuries.
Embodiments of the machine of the invention will be described below with reference ~o tlle drawings, in wllicll:
Figs. l to 6 diagrammatically show six different stages of operation of the strapping machine of the invention; and Fig. 7 is a diagrammatic view of the machine after the pulling of the loop 0 - and shortly before the heat-sealing.
In Fig. l, the tape 4 of heat-sealable plastic is conducted ~rom a tape feed, formed here by the supply roll 3, to a gripper consisting, of bottom part 6 and upper part 7. The tape 4 forms a tensioll strap portion 8 for a package l which is advanced on a conveyor path 2, arranged betweell the supply roll 3 an~l the gripper 6, 7, against the tensiolled strap portion 8. The advance of the package l can be effected by conveyor belts or pushcrs yreferably present on both sides of the strapping plane. The starting end S of the tape 4 is initially held fast by the gripper 6, 7.
In Fig. 2, the package l, upon its movement to the left, has pushed the strap portion 8 out to such an extent that the strap portion surrounds the package 1 on its bottom, front and top. The upper part lO of a clamp 9, 10 and a backing plate 13 are pushed between the bottom of the package 1 and the initial region 21 of the tape 4, said clamp and backing plate forming a single part. After the tape has been clamped and held between the bottom part 9 and the upper part 10 of the clamp, the gripper 6, 7 releases the starting end 5 of the tape. The upper part 7 of the gripper is pulled back out of ~he plane of the strapping. A smoothener 14 which moves forward and backward in the strapping plane smooths out the starting end of the tape 5 which has been released by the gripper 6, 7, by pressing it against the backing plate 13. This action also insures that the starting end S of the tape and the initial region 21 come to rest against the backing plate .
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20~20S5 13. The initial region 21 and the backing plate 13 extend from the starting end 5 of the tape up to the clamp g, 10.
Referring to Fig. 3, as soon as the rear of the package 1 has reached the backing plate 13, the tape feeder 15, which is initially arranged above the tape 4, presses the tape downward to a position below the conveyor patll 2 so that the package 1 is surrounded on all sides by the tape 4. Above the downwardly lo.wered tape feeder lS and below the plane of the initial region 21, a loop puller 16 can be inserted into the s~raypillg plane, it bcing moveable in direction of advancf~ parallel to the backing plate 13 and pulling, below the initial region 21, a loop which is formed of an upper part 17 Wllicll is adjacent to tlle initial region 21 and a lower part 18 which extends back to the tape feeder lS.
As shown in Fig. 4, in this stage of operation the opened gripper 6, 7 is brought into the strapping plane. The upper part 7 of the gripper 6,7 is between the upper part 17 of the loop and its lower part 18 so that, upon the closing of the gripper 6, 7, the lower part 18 of the loop is gripped in the vicinity of the lowered tape feeder lS, i.e. in the end region of the loop 17, 18.
, In Fig. 5, an ultrasonic heat-sealing head 12, disposed below the backing plate 13 and below the loop 17, 18, moves upward and heat-seals the two parts or layers of the loop 17, 18 against the initial region 21 of the tape. In this connection, the knife 2 o 20 and the lower part 6 of the gripper 6, 7, move rapidly forward so that the tape 4 and tape starting end 5 of the following operating cycle are clamped before the heat-sealing head 12 effects the heat-sealing. The ultrasonic heat-sealing head 12 forces the two parts of the loop 17, 18 against the initial region 21 of the tape Iying against the backing plate 13 and heat-seals Ihe two layers of the folded loop 17, 18 against the initial region 21.
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Referring to Fig. 6, the loop puller 16, the tape feecler 15, the clamp 9, 10, the backing plate 13 witll the upper part 22 of the clamp 7, 22, as well as the ultrasonic heat-sealing head 12 and the knife 20 return to their individual starting positions. The strapped package 1 is free and the strap portion 8 is ready for the 5 strapping of the ne~t package. In this connection, the gripper 6, 7 holds the new starting end of the tape 5 firMly until the clamp 9, 10 takes over, as sho~n in Fig. 2.
In the operating stage shown in Fig. 2, the downward movement of the tape feeder 15 is triggered by a sensor or a light barrier. The sensor or light barrier advises the drive of the tape feeder 15 when a package or a stack has passed through the lo p1ane of movement of the tape -feeder 15. After the clamp 9, lO has grasped tlle tape in the initial region 21 and the gripper 6, 7 has released the starting end 5 of the tape, the upper part 7 of the gripper 6, 7 is pulled back from the strapping plane. In the operating stage shown in Fig. 5, this upper part 7 of the gripper is brought into the strapping plane in order, together with the lower part 6, to grip that part 18 of the loop 17, 18 which e~ctends from the loop puller 16 in the vicinity of the tape feeder 15. The parts 6, 7 of the gripper are displaceable vertically independently of each other so that they can be shifted from a lower position into the higher position shown in Fig. 5.
In the operating stage shown in Fig. ~, the upper part of the gripper 6, 7 and the end region 22 of the backing plate 13 facing away from the direction of ad\~ance form another clamp, 7, 22. This structure holds the tape 4 stretched over the package or stack l in the region of the starting end of the upper part 17 of the loop 17, 18 before the loop puller 16 is pulled back out of the strapping plane. This upper part of the gripper 6, 7 and lower part of the second clamp 71 22 also form a cutting device with the knife 20. The lower edge of the upper part 7 of the gripper 6, 7 Iying in the direction ' ~
., I
2~20~
i - of advance is developecl as a cutting abutment which, togeLher witll the knife 20, prior to the sealing together, cuts ~he lower part of the loop 17, 18 off from the new starting end S of the tape gripped by the gripper 6, 7. The l;nife 20 can be moveable vertically independently of other parts of the machine or can be attached to the lower part of the gripper 6, 7 in such a manner that the tape is cut shortly before the gripper 6, 7 clamps the new starting end 5 of the tape.
Fig. 7 shows the stage of operation of Fig. 4 on a larger scale. In this case, the tapc ~ withdrawll from the supply roll 3 is guided over a roller which serves as tape feed 11. The strap portion 8 is formed between this tape feed 11 and the gripper 0 6, 7. Before tlle ~lltrasonic heat-sealillg head 20 is moved up to seal the two parts 17, 18 to the starting region 21, the second clamp 7, 22 clamps the starting region of the upper part of the loop 17, 18 in order to maintain the tension of the strapping when the tape puller 16 is withdrawn from the strapping plane shortly before the heat-sealing.
In order for the packages or stacks 1 to be strapped continuously, the strapping machine is moveable in the direction of advance of the packages or stacks 1 at the speed of said packages or stacks 1 and backward with greater speed in the direction opposite the direction of advance. The greater this backward speed, the smaller the distances between the packages 1 on the conveyor path 2 can be.
In order to effect a strapping transverse to the direction of advance of the conveyor path 2, the conveyor path 2 has a transversely extending slot of, for instance, 8 cm so that a strapping plane can be established in this slot with a gripper 6, 7, a first clamp 9, 10, a backing plate 13, a second clamp 7, 22 and an ultrasonic heat-sealing head 12 with knife 20. The feeding out of the strap portion 8 present alongside the conveyor path 2 is effected by means of a pusher which is displaceable transverse to the conveyor l l ~2~
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path 2 and the end of which is somewhat higher than the packages or stacks to bestrapped. Before a pacliage or stac}i reaches the slot, the pusher moves from one side of the conveyor path 2 to the other so that the package or stack can move into the strap portion 8. The package or stack 1 then stops above the transversely extending slot and 5 the tape feeder 15 moves into its lower position so that the loop puller pulls a loop 17, 18 below the backing plate 13 and the ultrasonic heat-sealing head 12 heat-seals the folded loop 17, 18, against the initial region 21 of the strapping. Thepusher contacts the strap portion 8 via a relatively thin plate which pushes the string out transverse to the conveyor path 2 and slides without difficulty, upon the further transport of the packages 0 1, out of the slot between the side wall of the package 1 and the strapping. This crosswise strapping machine was substalltially the same parts and units as described above.
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METHOD AND APPAI~TUS FOl~ TI-XE STI~APPING OF PACKAGES
Ol~ STACKS BY USING TAPE OF`HEAT-SE~I,ABI,l~ PLASTIC
The present invention relates to a strapping machine and a method of strapping packages or stacks.
Methods and strapping machines are disclosed in Federal Republic of Germany 39 lg 674. In the l~lown method, the upper part of the loop formed by the loop puller, adjacent to the initial region of the strapping, is heat-sealed to the initial region of the strapping by means of a heatillg tongue and pressure jaws. The strapping which is closed in this manner is separated from the rest of the tape on the side of the heat-sealill, device WhiCIl iS in the direction of feed after the gripper has previously gripped the new starting end of the tape. In this method, it is necessary that the gripper which grips the corresponding starting end of the tape be moved upon each operating cycle from the side of the heat-sealing device which is in the direction of feed to the other side of the device and turned 360.
The object of the invention is to provide a method of strapping packages 20 ~ or stacks, in particular, stacks of newspaper, in which movement of a gripper from a position in front of the heat-sealing device into a position behind the heat-sealing device is not necessary. I
Another object of the invention is to provide a machine for the strapping of packages or stacks which, at little expense for machinery and with high reliability of 25 operation, can, in rapid sequence, wrap packages or stacks which are advanced along a conveyor path.
The use of an ultrasonic heat-sealing head has the advantage over a heating tongue in that it is immediately ready for operation without the need for preheating. An - ultrasonic heat-sealing head rapidly and dependably seals the two layers of the initial 30 region of the strapping which lies against the backing plate and the loop folded on the i .
I
ultrasonic heat-sealing he~d to the s~rting region of the sLr~pping. By the double overlap of the in;tial region of the strapping by the folded loop, the result is~t~ jarts or layers of th~ loop can rcst snugly against the bottom of the package or stack and there is no elld ~vl~icll pro~rudcs rrom Lhe package or stacl; wllicll can lead to injuries.
Embodiments of the machine of the invention will be described below with reference ~o tlle drawings, in wllicll:
Figs. l to 6 diagrammatically show six different stages of operation of the strapping machine of the invention; and Fig. 7 is a diagrammatic view of the machine after the pulling of the loop 0 - and shortly before the heat-sealing.
In Fig. l, the tape 4 of heat-sealable plastic is conducted ~rom a tape feed, formed here by the supply roll 3, to a gripper consisting, of bottom part 6 and upper part 7. The tape 4 forms a tensioll strap portion 8 for a package l which is advanced on a conveyor path 2, arranged betweell the supply roll 3 an~l the gripper 6, 7, against the tensiolled strap portion 8. The advance of the package l can be effected by conveyor belts or pushcrs yreferably present on both sides of the strapping plane. The starting end S of the tape 4 is initially held fast by the gripper 6, 7.
In Fig. 2, the package l, upon its movement to the left, has pushed the strap portion 8 out to such an extent that the strap portion surrounds the package 1 on its bottom, front and top. The upper part lO of a clamp 9, 10 and a backing plate 13 are pushed between the bottom of the package 1 and the initial region 21 of the tape 4, said clamp and backing plate forming a single part. After the tape has been clamped and held between the bottom part 9 and the upper part 10 of the clamp, the gripper 6, 7 releases the starting end 5 of the tape. The upper part 7 of the gripper is pulled back out of ~he plane of the strapping. A smoothener 14 which moves forward and backward in the strapping plane smooths out the starting end of the tape 5 which has been released by the gripper 6, 7, by pressing it against the backing plate 13. This action also insures that the starting end S of the tape and the initial region 21 come to rest against the backing plate .
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20~20S5 13. The initial region 21 and the backing plate 13 extend from the starting end 5 of the tape up to the clamp g, 10.
Referring to Fig. 3, as soon as the rear of the package 1 has reached the backing plate 13, the tape feeder 15, which is initially arranged above the tape 4, presses the tape downward to a position below the conveyor patll 2 so that the package 1 is surrounded on all sides by the tape 4. Above the downwardly lo.wered tape feeder lS and below the plane of the initial region 21, a loop puller 16 can be inserted into the s~raypillg plane, it bcing moveable in direction of advancf~ parallel to the backing plate 13 and pulling, below the initial region 21, a loop which is formed of an upper part 17 Wllicll is adjacent to tlle initial region 21 and a lower part 18 which extends back to the tape feeder lS.
As shown in Fig. 4, in this stage of operation the opened gripper 6, 7 is brought into the strapping plane. The upper part 7 of the gripper 6,7 is between the upper part 17 of the loop and its lower part 18 so that, upon the closing of the gripper 6, 7, the lower part 18 of the loop is gripped in the vicinity of the lowered tape feeder lS, i.e. in the end region of the loop 17, 18.
, In Fig. 5, an ultrasonic heat-sealing head 12, disposed below the backing plate 13 and below the loop 17, 18, moves upward and heat-seals the two parts or layers of the loop 17, 18 against the initial region 21 of the tape. In this connection, the knife 2 o 20 and the lower part 6 of the gripper 6, 7, move rapidly forward so that the tape 4 and tape starting end 5 of the following operating cycle are clamped before the heat-sealing head 12 effects the heat-sealing. The ultrasonic heat-sealing head 12 forces the two parts of the loop 17, 18 against the initial region 21 of the tape Iying against the backing plate 13 and heat-seals Ihe two layers of the folded loop 17, 18 against the initial region 21.
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Referring to Fig. 6, the loop puller 16, the tape feecler 15, the clamp 9, 10, the backing plate 13 witll the upper part 22 of the clamp 7, 22, as well as the ultrasonic heat-sealing head 12 and the knife 20 return to their individual starting positions. The strapped package 1 is free and the strap portion 8 is ready for the 5 strapping of the ne~t package. In this connection, the gripper 6, 7 holds the new starting end of the tape 5 firMly until the clamp 9, 10 takes over, as sho~n in Fig. 2.
In the operating stage shown in Fig. 2, the downward movement of the tape feeder 15 is triggered by a sensor or a light barrier. The sensor or light barrier advises the drive of the tape feeder 15 when a package or a stack has passed through the lo p1ane of movement of the tape -feeder 15. After the clamp 9, lO has grasped tlle tape in the initial region 21 and the gripper 6, 7 has released the starting end 5 of the tape, the upper part 7 of the gripper 6, 7 is pulled back from the strapping plane. In the operating stage shown in Fig. 5, this upper part 7 of the gripper is brought into the strapping plane in order, together with the lower part 6, to grip that part 18 of the loop 17, 18 which e~ctends from the loop puller 16 in the vicinity of the tape feeder 15. The parts 6, 7 of the gripper are displaceable vertically independently of each other so that they can be shifted from a lower position into the higher position shown in Fig. 5.
In the operating stage shown in Fig. ~, the upper part of the gripper 6, 7 and the end region 22 of the backing plate 13 facing away from the direction of ad\~ance form another clamp, 7, 22. This structure holds the tape 4 stretched over the package or stack l in the region of the starting end of the upper part 17 of the loop 17, 18 before the loop puller 16 is pulled back out of the strapping plane. This upper part of the gripper 6, 7 and lower part of the second clamp 71 22 also form a cutting device with the knife 20. The lower edge of the upper part 7 of the gripper 6, 7 Iying in the direction ' ~
., I
2~20~
i - of advance is developecl as a cutting abutment which, togeLher witll the knife 20, prior to the sealing together, cuts ~he lower part of the loop 17, 18 off from the new starting end S of the tape gripped by the gripper 6, 7. The l;nife 20 can be moveable vertically independently of other parts of the machine or can be attached to the lower part of the gripper 6, 7 in such a manner that the tape is cut shortly before the gripper 6, 7 clamps the new starting end 5 of the tape.
Fig. 7 shows the stage of operation of Fig. 4 on a larger scale. In this case, the tapc ~ withdrawll from the supply roll 3 is guided over a roller which serves as tape feed 11. The strap portion 8 is formed between this tape feed 11 and the gripper 0 6, 7. Before tlle ~lltrasonic heat-sealillg head 20 is moved up to seal the two parts 17, 18 to the starting region 21, the second clamp 7, 22 clamps the starting region of the upper part of the loop 17, 18 in order to maintain the tension of the strapping when the tape puller 16 is withdrawn from the strapping plane shortly before the heat-sealing.
In order for the packages or stacks 1 to be strapped continuously, the strapping machine is moveable in the direction of advance of the packages or stacks 1 at the speed of said packages or stacks 1 and backward with greater speed in the direction opposite the direction of advance. The greater this backward speed, the smaller the distances between the packages 1 on the conveyor path 2 can be.
In order to effect a strapping transverse to the direction of advance of the conveyor path 2, the conveyor path 2 has a transversely extending slot of, for instance, 8 cm so that a strapping plane can be established in this slot with a gripper 6, 7, a first clamp 9, 10, a backing plate 13, a second clamp 7, 22 and an ultrasonic heat-sealing head 12 with knife 20. The feeding out of the strap portion 8 present alongside the conveyor path 2 is effected by means of a pusher which is displaceable transverse to the conveyor l l ~2~
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path 2 and the end of which is somewhat higher than the packages or stacks to bestrapped. Before a pacliage or stac}i reaches the slot, the pusher moves from one side of the conveyor path 2 to the other so that the package or stack can move into the strap portion 8. The package or stack 1 then stops above the transversely extending slot and 5 the tape feeder 15 moves into its lower position so that the loop puller pulls a loop 17, 18 below the backing plate 13 and the ultrasonic heat-sealing head 12 heat-seals the folded loop 17, 18, against the initial region 21 of the strapping. Thepusher contacts the strap portion 8 via a relatively thin plate which pushes the string out transverse to the conveyor path 2 and slides without difficulty, upon the further transport of the packages 0 1, out of the slot between the side wall of the package 1 and the strapping. This crosswise strapping machine was substalltially the same parts and units as described above.
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Claims (9)
- IN THE CLAIMS:
l. A method of strapping packages or stacks, using tape (4) of heat-sealable plastic withdrawn from a supply roll comprising the steps of in which the starting end (5) of holding a starting end of the tape in the vicinity of the rear lower corner of a package or stack (1), advancing said package against a tensioned strap portion (8) of the tape (4), parallel to the bottom of said package or stack; guiding said starting end (5) of the tape (4) around the package or stack (1) pulling a loop (17, 18) parallel to an initial region (21) of the strapping tape (4), the part (17) heat sealing a portion of the tape which travels in the direction of advance and overlaps the initial region (21) to the initial region (21); and cutting the strapping of the package or stack (1) which is thus closed from the rest of the tape (4), characterized by the fact that shortly before, during or after the heat-sealing the strapping is cut off from the rest of the tape (4) at the end of the loop (17, 18) which extends in a direction opposite the direction of advance and both parts of the loop are pressed together and heat-sealed to each other and to the initial region (21). - 2. The method according to Claim 1, wherein the heat-sealing step is effected by ultrasonics.
- 3. An apparatus for the strapping of packages or stacks (1) using a tape (4) of heat-sealable plastic withdrawn from a supply roll (3), comprising conveyor means for advancing a package or stack; means for pushing a strap portion (8) of a tape (4) in front of the packages or stacks (1) to be strapped; means for stretching said tape between a gripper (6, 7) holding a starting end (5) of the tape and a tape feed located at a distance above the conveyor means (2), in which connection, above the strap portion (8), said tape feed initially disposed in a starting position above the top of the packages or stacks and, after passage of a package or stack, (1) movable into a lowered position below the conveyor path (2), thereby moving the strap portion (8) towards the starting end (15) of the tape; a loop puller (16) insertable into the plane of the string and movable in a direction of advance of said package, said loop puller pulling beneath an initial region (21) a loop formed in said string; heat-sealing means for heat-sealing the initial region (21) of the strap portion to the loop (17, 18) and cutting means for cutting the strapping off the rest of the tape (4), the gripper (6, 7) gripping a starting end of the tape newly formed by the cutting for a subsequent operating cycle, said heat sealing means including an upwardly moveable ultrasonic heat-sealing head (12) which heat-seals the loop to the initial region (21) of the strap portion and the cutting means being so arranged that it cuts the tape (4) at the end of the lower part (18) of the loop.
- 4. The apparatus according to Claim 3, characterized by the fact that, above the ultrasonic heat-sealing head (12) between the initial region (21) of the strap portion and the bottom of the package or stack (1), a backing plate (13) is insertable such that the end region thereof, facing in the direction of advance, forms an upper part (10) of a first clamp (9, 10) and the end region thereof facing opposite the direction of advance forms an upper part (22) of a second clamp (7, 22).
- 5. The apparatus according to Claim 3, characterized by the fact that a lower part and an upper part of the gripper (6, 7) and the knife (20) are controllable in their upward movement such that, after the formation of the loop (17, 18) they move out in advance of the upward movement of the ultrasonic heat-sealing head (12) and the tape is first clamped between an upper part of the gripper and an upper part (22) of the second clamp (7, 22), whereupon the knife (20), which advances slightly as compared with the lower part (6) of the gripper (6, 7), cuts the tape (4) and the gripper (6, 7) grasps the new starting end (5') of the tape and then the ultrasonic heat-sealing head (12) presses the loop (17, 18) together against the starting region (21) and heat-seals the three sections of the tape to each other.
- 6. The apparatus according to Claims 3, characterized by the fact that the knife (20) is fastened to the lower part (6) of the gripper (6, 7) and a lower edge, lying in the direction of advance, of the upper part (7) of the gripper is developed as cutting abutment.
- 7. The apparatus according to claims 3, characterized by the fact that it is moveable in the direction of advance with the speed of advance of the packages or stacks (1) and, after completion of a strapping, can be moved back with a speed adapted to the distance apart of the packages or stacks (1) on the conveyor path (2).
- 8. The apparatus according to Claim 3, further comprising means for transverse strapping including a slot passing transversely to the conveyor path (2); pusher means for pushing strap portion (8), said pusher means being out by a displaceable transverse to the conveyor path (2) such that a package or stack (1) can be introduced into contact with strap portion (8) and in which the pusher can be pulled out of the conveyor path (2) and be moved back into its starting position in front of the strap portion (8); and, a tape feed (11), a tape feeder (15) and a loop puller (16) arranged between the starting position of the pusher and one side of the conveyor path (2) on which the gripper (6, 7), the second clamp (7, 22) and the abutment plate (13).
- 9. The apparatus according to Claim 8, further including a smoothener (14) which is insertable into a strapping plane and presses the initial region (21) of the strap portion against the abutment plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2082055 CA2082055A1 (en) | 1991-03-06 | 1991-03-06 | Method and apparatus for the strapping of packages or stacks by using tape of heat-sealable plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2082055 CA2082055A1 (en) | 1991-03-06 | 1991-03-06 | Method and apparatus for the strapping of packages or stacks by using tape of heat-sealable plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2082055A1 true CA2082055A1 (en) | 1992-09-07 |
Family
ID=4150632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2082055 Abandoned CA2082055A1 (en) | 1991-03-06 | 1991-03-06 | Method and apparatus for the strapping of packages or stacks by using tape of heat-sealable plastic |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2082055A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113911434A (en) * | 2021-09-08 | 2022-01-11 | 杨柳 | Waste paper board bundling machine |
-
1991
- 1991-03-06 CA CA 2082055 patent/CA2082055A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113911434A (en) * | 2021-09-08 | 2022-01-11 | 杨柳 | Waste paper board bundling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |