JPH08207139A - Device for fusing handle to semitubular film plastic film web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a fusing time while increasing production capacity by providing additional fusing jaws cooperating with fusing jaws respectively arranged inside and outside a semi-tubular plastic film tube to a fusing station. SOLUTION: The upper side wall of a semi-tubular plastic film web 10 is partially ruptured and a part of a fusing station is arranged between the side walls of the semi-tubular plastic film web 10 and mutually opposed heating type fusing jaws 32, 34 are attached to the plate 30 vertically attached to a holder 28 within the plane extending between the side walls of the semi-tubular plastic film web 10 and fusing contours 36, 38 are formed to the fusing jaws. The upper handle 48 among a pair of handles is provided at a position where it is integrally fused to the semi-tubular plastic film web 10 present inside the fusing station 18 by the cooperation with the fusing jaw 32 or 34 and the fusing jaw positioned outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fusing a handle to a semi-circular plastic film web according to the preamble of claim 1.

[0002]

BACKGROUND OF THE INVENTION One device of this type is already known.
This known device comprises a handle forming station and a fusing jaw which is movable from the outside to the semicircular plastic film web to fuse the ends of the handle and the semicircular plastic film web together. And a destination station. In this known device, the fusing process is carried out exclusively from the outside, i.e. from the top and the bottom by means of fusing jaws. In order to prevent both handles from being fused together during the process of fusing the paired handles, the paired handles are separated from each other by a releasing agent.
It means that it has to be processed in t). Also,
Each fusion process requires a relatively long time.

[0003]

The invention is based on the object of providing a device of the type mentioned at the outset, which makes it possible to reduce the fusing time and to correspondingly increase the production capacity. The invention also aims at eliminating the use of release agents.

[0004]

SUMMARY OF THE INVENTION In accordance with the present invention, the above objective is to provide a fuser having an additional fusing jaw disposed on the inside of a semi-tubular plastic film web and cooperating with a fusion jaw located on the outside. This is accomplished by providing a landing station. With this arrangement, the heat required for the fusing process is introduced from both sides, so that each end of the handle can be fused to the corresponding wall of the tubular plastic film web in a very short time. Also, since each fusing jaw is located between the corresponding ends of the handle, the use of a release agent can be omitted. A preferred embodiment as claimed in claim 2 relates to suspending the fusing jaws inside the semi-tubular film. A preferred embodiment according to claim 3 relates to a mechanism for winding or unwinding Teflon strips and for conveying the Teflon strips on their respective welding jaw contours. Claim 4
The other subclaims [1] to [6] describe embodiments of the device according to the invention for forming the respective pair of handles and delivering them to the fusing station. In this case, both free ends of the pair of handles can be conveyed onto the inner additional fusion-bonding jaws, and the respective pairs of handles can be simultaneously fixedly fused to the side wall of the semi-tubular film.

[0005]

Further details and advantages of the invention are given in the following:
A description will be given with reference to an embodiment shown in the drawings. FIG. 2 shows a semi-tubular plastic film web 10 having a bottom fold 12 with two fold edges 14, 16 and conveyed in the direction of arrow A. In FIG. 2, the semi-tubular film 10
The upper side wall of the fusing station 18 is partially broken.
A part of is visible. Fusion station 18
This portion of the is located between the sidewalls of the semi-tubular film 10. This part of the fusing device 18 is supported by an arm 20, which is laterally guided in a guide 24 on a transverse frame 22 and displaced by a piston / cylinder unit 26, as shown in FIG. It A holder 28, which is aligned parallel to the lateral ends of the semi-tubular film 10, is welded perpendicular to the arm 20.
In the plane extending between the side walls of the semi-tubular film, the plate 30 is
It is vertically attached to the holder 28. The plate 30 has
Attached to each other are heat-type fusing jaws 32, 34, which show fusing contours 36, 38. Adjacent to the plate 30 and the fusing jaws 32, 34,
Guide plates 40 and 42 are arranged on the holder 28. Guide inclined portions 44 and 46 are provided at the free ends of these guide plates, respectively.
The functions of 4, 46 will be described later. In FIG. 2, the upper handle 48 of the pair of handles is shown as the fusing jaws 32 or 3.
4 and an outer fusing jaw (not shown) are shown in position to be fused together with the semi-tubular film 10 inside the fusing station 18.

FIG. 1 shows the part of the device which is arranged adjacent to the part shown in FIG. A pair of handles is essentially formed in this part of the device and transported to the fusing station 18. As shown in FIG. 1, the lateral frame 22 is
It is connected to a lateral frame 52 via a cross beam 50. Inside both lateral frames 22, 52, mechanically driven cam plates 54, 56 or 58, 60 rotate. Two respective superposition guides (superimp
Fused guides 62, 64 are arranged parallel to the lateral frames 22, 52. Within the guides 62, 64, projecting arms 66, 68 (with their free ends terminating in fork elements 70, 72 respectively) are movably arranged. Displacement of the protruding arms 66 and 68 along the two overlapping guides 62 and 64 is realized by the driven cam plates 54 and 56. In addition, the carriages arranged above and below each other are overlapped guides 6.
Guided on 2, 64 and in FIG. 1, an upper carriage 74 is shown driven back and forth by cam plates 58, 60. Two overlapping film reels are arranged inside the frame, and only one film reel 76 is shown in the drawing. From these film reels, two superposed films 80 are unwound via a pair of advancing rollers (only the upper advancing roller 78 is shown in FIG. 1). These films are conveyed onto the fork elements 70, 72, respectively, with both superposed films covering the fork elements 70, 72 in a sandwich fashion. When advancing the film web 80, the fork elements 70, 72 are also advanced until the front end of the film web 80 is located at the cutting station 82. The cutting station 82 has a lower knife 84 fixed to the frame and a movable and guide 8 relative to the knife 84.
8 and an upper knife 86 which is guided in 8 and displaced by a piston / cylinder unit 90.

The upper rotary plunger 92 has a broken line 9
It is arranged on the carriage 74 so that it can move along the line 4. The guide along the broken line 94 will be described later. In this case, both rotary plungers are simultaneously displaced within the groove 96 (FIG. 1) machined in the carriage 74. Due to the displacement of the carriage and the corresponding limiting guide, the corresponding gear 98 of the upper rotary plunger 92 rolls along the toothed rack 100 while the upper rotary plunger 92 is displaced along the curved path 94. The rack 100 is constructed so that the upper rotary plunger rotates in the direction of the arrow while the upper carriage 74 moves.
It is fixed to the carriage 74 via the holder 102.
The same applies to the lower rotary plunger (not shown in detail in FIG. 1). 10 to 1
The upper and lower rotary plunger designs will be described with reference to FIG. The design of the upper rotary plunger 92 is shown in detail in FIG. The upper rotary plunger moves within the groove 96 of the upper carriage 74. The gear 98 meshes with the toothed rack 100. The upper free end of the upper rotary plunger 92 is guided in a plate 104 in which a curved path 94 is formed. A rubber coating 106 is provided on the opposite end of the rotary plunger 92.

FIG. 10 shows one of the lower rotary plungers 108. This rotary plunger 10
8 also extends into the groove 110 of the carriage 112. The lower rotary plunger 108 has a gear 114 that meshes with a toothed rack 116. The lower free end of the lower rotary plunger 108 is guided in a guide groove 118 of a rail 120 fixed to the transverse frame. The path of this guide groove 118 is shown in FIG.
II-XII direction). This path of the guide groove 118 coincides with the broken line 94 in FIG. Transport strap 1 with stopper pin 124
22 is rotatably connected to the rotary plunger. Head 1 of lower rotary plunger 108
A stopper pin 128 is provided at 26. The carrier strap is spring biased by a flat spiral spring 130 so that the pins 124 and 128 abut. In this configuration, the carrier strap 122 is attached to the spiral spring 13
It is possible to move in one rotation direction against 0 force. FIG. 11 is a view of the lower rotary plunger 108 in the direction of arrow XI in FIG. In this case, identical components are designated with the same reference numbers. Figure 11
Is a slot 13 on the upper arm of the carrier strap 122.
2 (the function of the slot will be described later) is shown. 10 and 11 show the supply reel 7
Both plastic film webs 80 unwound from 6
Is shown.

Now referring to FIG. 3, the fork element 7
The cooperation between the 0, 72 and the rotary plungers 92, 108 will be described in detail. In FIG. 3, a pair of forward rollers 7
8, 78 'are shown. These two advancing rollers unwind two plastic film webs 80 from two supply reels 76 (not shown in detail in FIG. 3). These unwound plastic film webs 80 will move through the fork elements 70, 72 (of these fork elements until the fork of the fork element 72 overlaps the upper arm of the carrier strap 122 as shown in FIG. 3). Element 72 only (shown in FIG. 3) is moved forward. Next, the design of the lower rotary plunger 108 will be described with reference to FIGS. 10 is seen from the direction of arrow X in FIG. 3, and FIG. 13 is seen from the direction of arrow XIII of FIG. This drawing shows the upper rotary plunger 9
2 is shown. FIG. 3 also shows a fixed knife 84 below the cutting station and a movable knife 86 above the cutting station. When the film web 80 and the fork element 70 or 72 are moved to the position shown in FIG. 3, the fork element 70 or 72 is retracted so that the position shown in FIGS. 8 and 9 is achieved. Here, the upper knife 86 is moved downward inside the cutting station to cooperate with the lower knife 84 fixed to the frame to cut the two strips from the front end of the film web 80. These two strips are successively deposited on the upper arm of the carrier strap 122. 8 is a sectional view taken along line XIII-XIII in FIG.
FIG. 2 is a sectional view taken along line IX-IX in FIG. 1. FIG. 9 shows a strip cut from the plastic film web 80 being clamped between the upper and lower rotary plungers 92, 108 in a region of the carrier strap 122 that does not rest on the upper arm.

The handle 48 shown in FIG. 2 is formed of a strip cut from a plastic film 80 and is linearly aligned by rotating the upper and lower rotary plungers 92,108. During this rotational movement, the free end of the handle rests on the upper arm of the carrier strap 122 which is being rotated simultaneously with the lower rotary plunger 108. As the transport strap 122 rotates, the transport strap notch 132 contacts the wedges 44 or 46 of the guide plates 40, 42, thereby allowing the transport strap 122 to continue rotating while the rotary plunger 108 continues to rotate. Is prevented from rotating further and is held against the force of spring 130. Due to the fact that the plastic strip 80 is clamped between the rotary plungers 92, 108, the plastic strip is further rotated (ie until the plastic strip contacts the fusing contours 36, 38 of the fusing jaws 32, 34). Rotated on plates 40, 42). At this position, the free ends of the pair of handles 48 are located in the semi-tubular film 1.
It is fused together with 0. In this case, the fusion jaw 130,
132 is moved from the outside towards the plastic film web as shown in FIG. After the fusing step, the rotary plungers 92, 108 are again rotated back and the transport straps 122 also have their respective limit stoppers 12.
Returned via 8,124.

FIG. 7 again shows in detail how the carrier strap 122 contacts the wedge 44 of the guide plate 40 (where the slot 132 overlaps the tip of the wedge). In the state shown in FIG. 7, the rotary plunger 92 or 108 has already been rotated further, and the plastic strip 80 has been pushed out onto the wedge portion 44. FIG. 6 is a sectional view taken along line VI-VI in FIG. This figure shows a cross section of a semi-tubular film 10 with a bottom fold 12. Additional fusion jaw 36
It will be readily seen that is located on the plate 30 between the folded edge regions 14, 16 of the semi-tubular film 10. The additional fusing jaws 36 or 38 (the additional fusing jaws 38 are not shown in FIG. 6) are heated via the heating cartridge 134. A Teflon strip 136 is conveyed on the fusing jaws. This Teflon strip is unwound from reel 138 and reel 140
Wound up. The reel 138 and the reel 140 are
It is attached to the plate 30 via a holder 142. Next, referring to FIGS. 4 and 5, the Teflon strip 13
6 will be described. FIG. 4 is viewed from the direction of arrow IV in FIG. The Teflon strip 136 is unwound from the reel 138 in the direction of the arrow and the reversing rod 1
You will be guided around 44. The reversing rod 144 has the Teflon strip deflected by 90 ° and is conveyed in the direction of the arrow onto the fusing contour 36 of the fusing jaw 32.
The Teflon strip is inverted in this position and guided under the plate 30 in the direction of the arrow in FIG. 5 (FIG. 5 as viewed in the direction of arrow V in FIG. 6). The Teflon strip is conveyed below the fusing jaws 34 onto the fusing contour 38 'and then onto the fusing jaws 34 (ie, fusing contour 38 as shown in FIG. 4). Biased.
The Teflon strip extends substantially in the direction of the arrow until it reaches the reversing rod 146, at which the direction is changed again by 90 °, whereby
The Teflon strip is wound around plate 30 in the direction of the arrow and then wound onto reel 140 as shown in FIG.

[Brief description of drawings]

1 is a partial plan view of an embodiment of the device of the present invention,
It shows the main part of the handle forming station.

FIG. 2 is a plan view of another portion of the embodiment of FIG. 1, primarily showing the fusing station.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a partial plan view of the fusing station shown in FIG. 2, as seen from the IV-IV direction of FIG.

5 is a bottom view showing details of FIG. 4 (viewed from the direction VV in FIG. 6).

6 is a cross-sectional view taken along line VI-VI of FIG.

7 is a cross-sectional view taken along the line VII-VII of FIG.

8 is a cross-sectional view taken along the line VIII-VIII in FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a side view showing in detail the rotary plunger below the handle forming station.

11 is a detailed view seen from the XI-XI direction in FIG.

12 is a cross-sectional view taken along the line XII-XII in FIG.

FIG. 13 is a side view of the rotary plunger above the handle forming station of the illustrated embodiment.

[Explanation of symbols]

 10 Semi-tubular plastic film web 18 Fusing station 32 Fusing jaw 34 Fusing jaw 48 Handle 70 Fork element 72 Fork element 76 Film reel 80 Overlapping film 82 Cutting station 92 Upper rotary plunger 108 Lower rotary plunger 122 Transport strap 138 reel 140 reels

 ─────────────────────────────────────────────────── ——————————————————————————————————————————————————————————————— Inventor Hans Ludwig Voss Federal Republic of Germany 49545 Teckenbrück Wäststraße 12

Claims (6)

[Claims] 1. A handle forming station and a fusing station, wherein the fusing station is adapted to fuse the end of the handle and the semi-tubular plastic film web together from the outside to the semi-tubular plastic film web. In a device for fusing a handle to a semi-tubular plastic film web, the fusing station being provided with movable fusing jaws, the fusing station being located inside and outside the semi-tubular plastic film web. An apparatus characterized in that an additional fusing jaw is provided which cooperates with the jaw. 2. Device according to claim 1, characterized in that the additional fusing jaws are mounted on a plate arranged inside the semi-tubular web via a holder and an arm. 3. The plate to which the add-on element is attached supports an additional take-up / unwinding mechanism for a Teflon strip carried on a heating-type additional fusing jaw, above the plate and Device according to claim 2, characterized in that between the additional fusing jaws there are two reversing rods correspondingly guiding the Teflon strip. 4. A frame of the handle forming station is provided with two overlapping film reels, and two overlapping plastic film webs from the film reels through a pair of advancing rollers arranged in series. A cutting station is provided for cutting the unwound and advanced plastic film web into strips, the carriage being guided longitudinally in a frame, which carriage grips the separated overlapping plastic strips, 4. An apparatus as claimed in any one of the preceding claims, characterized in that the strip is formed into a handle and contains a rotatable and movable rotary plunger for guiding the handle to the fusing station. 5. A laterally projecting arm with a fork element is guided longitudinally in said frame, said fork element being arranged between plastic film webs advanced by advancing rollers and unrolled plastic. To position the front end of the film web at the cutting station, it is moved forward at the same time as the plastic film web and the transport strap connected to one rotary plunger is rotated into the notch of the fork element and the fork element is retracted. 5. A device according to claim 4, characterized in that the plastic strips are located on both sides of the carrier strap after they have been cut by a cutting device. 6. Additional guide plates are respectively arranged laterally of the plates supporting the additional fusion-bonding jaws and attached to the holder, and one side portion of the additional guide plates terminates in a wedge shape. , The additional guide plate can engage the corresponding slotted carrying strap when the corresponding rotary plunger is rotated, and the free end of the plastic film web is removed from the carrying strap by further rotating the rotary plunger. 6. The device of claim 5, wherein the device is displaced into and out of the guide plate to the fusing jaws.