EP1144122B1 - Roller glueing machine for processing leather goods - Google Patents

Roller glueing machine for processing leather goods Download PDF

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Publication number
EP1144122B1
EP1144122B1 EP00901317A EP00901317A EP1144122B1 EP 1144122 B1 EP1144122 B1 EP 1144122B1 EP 00901317 A EP00901317 A EP 00901317A EP 00901317 A EP00901317 A EP 00901317A EP 1144122 B1 EP1144122 B1 EP 1144122B1
Authority
EP
European Patent Office
Prior art keywords
roller
shaft
glueing machine
free end
counter
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 - Lifetime
Application number
EP00901317A
Other languages
German (de)
French (fr)
Other versions
EP1144122A1 (en
Inventor
Piero Zanetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zanellati E Zanetti Di Zanetti Piero Silvia E C
Original Assignee
ZANELLATI E ZANETTI DI ZANETTI
ZANELLATI E ZANETTI di ZANETTI PIERO SILVIA E C Sas
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Publication of EP1144122A1 publication Critical patent/EP1144122A1/en
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Publication of EP1144122B1 publication Critical patent/EP1144122B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers

Definitions

  • the present invention relates to a roller glueing machine for processing leather goods according to the precharacterising part of claim 1.
  • the roller coating of adhesives such as latex, water-based neoprene or other water-based adhesives provides significant advantages, among which are a better grip, lower toxicity, a cost saving up to 30 - 40%, and a greater cleanness, both because the roller coating prevents dispersion beyond the item, and also because, in the case of latex, the machine may be cleaned by simply removing dried latex from the rollers.
  • a roller glueing machine essentially comprises an upper nip roller and a coating counter-roller for the adhesive, which draws from a container in which it is partly immersed.
  • GB 1 558 500 discloses an apparatus for applying to i.a. leather fabrics, an emulsion in water of a flameproofing agent, the apparatus featuring the above general structure.
  • a nip roller will be referred to for shortness, it must be understood that, for example, for processing stripe-shaped items such as belts, stripes, shoulder straps and the like, the nip roller can be replaced by two or more contiguous rollers assembled on the same shaft, if necessary shaped so as to be complementary to the fleshed portion of the item being processed.
  • the nip roller When a leather item passes through the gap between the rollers, the nip roller is lowered toward the counter-roller; the item is thus coated with adhesive onto its lower side.
  • a first type of roller glueing machine the shaft of the nip roller is supported at both ends within two parallel uprights; however, this type of arrangement has two intrinsic disadvantages. In face, the dimension of the glueing span is fixed; thus, this type of glueing machine cannot be used, in particular, for glueing end portions of bulky objects, such as handbag hems and the like. In addition, the disassembly of the nip roller, for example for cleaning or replacing, is cumbersome.
  • a second type of roller glueing machine wherein the nip roller is cantilevered, that is to say, it is supported only at one end. More particularly, a roller glueing according to the preamble of claim 1 is known. With this arrangement, however, there is the problem that the pressure exerted along the gap with the coating counter-roller is not sufficiently even, since the shaft loses parallelism during the pressure step. In particular, this means that the glueing along the width of the item being processed is not even, and it could even be missing at the side corresponding to the free end of the shaft of the nip roller.
  • Object of the present invention is to provide a roller glueing machine that obviates the above disadvantages of both types of known roller glueing machines, that is to say, a type of roller glueing machine wherein the nip roller is cantilevered, but still keeps the parallelism in the pressure step so as to produce an even coating of adhesive along the entire gap with the counter-roller.
  • EP 0 813 960 discloses cantilever-mounted printing cylinders of a rotary printing machine, the printing cylinders having means for positioning the printing cylinders such that, when set against each other, they assume an approximately parallel position.
  • said means comprise pneumatic cylinders or the like extended between the free ends of the shafts of adjacent printing cylinders in order to exert a traction action therebetween.
  • US 5,617,789 discloses a printing press with a counterpressure cylinder and a printing roller cantilevered at one end in a stand.
  • a plate is coupled to the stand and provided with bearings -or receivers for bearings- in order to accomodate the journal of the free end of the printing roller, the plate being able to be swung to either a retracted position, in which the cantilevered roller is freely accessible, or to an operating position, where the journal of the free end of the printing roller is carried by the plate. More in particular, the journal or the bearing is held between a limit stop and an abutment travelling toward the limit stop, the latter being operated through a pneumatic cylinder.
  • a roller glueing machine 10 comprises an upper nip roller 12 and a coating counter-roller 14 for the adhesive, which draws from a container (not shown) in which it is partly immersed.
  • the nip roller 12 is assembled on a shaft 16 supported at a first end 18 to the glueing machine, and provided with actuating means for lowering it towards the coating counter-roller 14, for example in the shape of a lever 20 operated by a pedal 22 through a traction cable 24, schematically illustrated by a dashed line, and provided with a return spring (not shown).
  • a compensation system is provided for maintaining the shaft horizontal, in the shape of a lever 28 one free end 30 of which, in the lowered position of lever 28, engages the end 26 of shaft 16 pushing it towards the coating counter-roller 14.
  • Bearing means for example in the shape of a wheel 32 at the free end 30 of lever 28, are provided for the purpose of favouring the rolling of shaft 26.
  • lever 28 is operated by a traction cable 34 controlled by the same pedal 22 which operates the lever 20 for actuating the nip roller 12; thus, the two levers 20, 28 are operated simultaneously.
  • a return spring 36 and a dowel 38 to adjust the position of the lever according, for example, to the thickness of the material being processed.
  • levers 20, 28 are actuated through a respective piston and cylinder device, 40, 42 respectively, for example of the pneumatic type.
  • the operation is controlled by a sensor, for example an optical reader 44, which detects the presence of an item in the gap between the nip roller 12 and the coating counter-roller 14.
  • Figure 3 shows a simplified compensation system wherein a piston and cylinder device 46 directly operates with the free end of its piston rod 48 against the free end 26 of shaft 16, preferably provided with the bearing wheel 32. Also in this case, sensor 44 advantageously controls the operation.
  • Figure 4 shows another compensation system wherein the piston rod 52 of a piston and cylinder device 50 is provided with a joint 54 with bearings so as to exert a pull action on the free end 26 of shaft 16, preferably in response to the detection of an item by sensor 44.
  • this type of embodiment is not suitable for bulky items since it takes up the insertion side of the gap between the rollers 12, 14, and requires the removal of joint 54 for maintenance, cleaning and replacing of roller 18.
  • Figures 3 and 4 do not show the actuating means at the supported end 18 of shaft 16, which can be of any traditionally used type, preferably as shown in the embodiment of Figure 2.

Landscapes

  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Coating Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Noodles (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

A roller glueing machine (10) for processing leather goods is described, comprising at least one nip roller (12) supported on a shaft (16), a coating counter-roller (14) for adhesive and means for actuating said shaft (16) for pressing said at least one nip roller (12) towards said coating counter-roller (14), wherein said shaft (16) is cantilevered at a first end (18), characterised by means for compensating the horizontality of said shaft (16), said compensation means exerting a force at the free end (26) of said shaft (16) towards said coating counter-roller (14). An even coating of adhesive along the entire gap with the counter-roller is thus provided.

Description

The present invention relates to a roller glueing machine for processing leather goods according to the precharacterising part of claim 1.
Although in recent years the field of leather goods has mainly tended towards the use of spray adhesives, the roller coating of adhesives such as latex, water-based neoprene or other water-based adhesives provides significant advantages, among which are a better grip, lower toxicity, a cost saving up to 30 - 40%, and a greater cleanness, both because the roller coating prevents dispersion beyond the item, and also because, in the case of latex, the machine may be cleaned by simply removing dried latex from the rollers.
A roller glueing machine essentially comprises an upper nip roller and a coating counter-roller for the adhesive, which draws from a container in which it is partly immersed. GB 1 558 500 discloses an apparatus for applying to i.a. leather fabrics, an emulsion in water of a flameproofing agent, the apparatus featuring the above general structure. Although in the present description a nip roller will be referred to for shortness, it must be understood that, for example, for processing stripe-shaped items such as belts, stripes, shoulder straps and the like, the nip roller can be replaced by two or more contiguous rollers assembled on the same shaft, if necessary shaped so as to be complementary to the fleshed portion of the item being processed.
When a leather item passes through the gap between the rollers, the nip roller is lowered toward the counter-roller; the item is thus coated with adhesive onto its lower side. In a first type of roller glueing machine, the shaft of the nip roller is supported at both ends within two parallel uprights; however, this type of arrangement has two intrinsic disadvantages. In face, the dimension of the glueing span is fixed; thus, this type of glueing machine cannot be used, in particular, for glueing end portions of bulky objects, such as handbag hems and the like. In addition, the disassembly of the nip roller, for example for cleaning or replacing, is cumbersome.
To obviate said problems, a second type of roller glueing machine is known, wherein the nip roller is cantilevered, that is to say, it is supported only at one end. More particularly, a roller glueing according to the preamble of claim 1 is known. With this arrangement, however, there is the problem that the pressure exerted along the gap with the coating counter-roller is not sufficiently even, since the shaft loses parallelism during the pressure step. In particular, this means that the glueing along the width of the item being processed is not even, and it could even be missing at the side corresponding to the free end of the shaft of the nip roller.
Object of the present invention is to provide a roller glueing machine that obviates the above disadvantages of both types of known roller glueing machines, that is to say, a type of roller glueing machine wherein the nip roller is cantilevered, but still keeps the parallelism in the pressure step so as to produce an even coating of adhesive along the entire gap with the counter-roller.
EP 0 813 960 discloses cantilever-mounted printing cylinders of a rotary printing machine, the printing cylinders having means for positioning the printing cylinders such that, when set against each other, they assume an approximately parallel position. In one embodiment, said means comprise pneumatic cylinders or the like extended between the free ends of the shafts of adjacent printing cylinders in order to exert a traction action therebetween.
US 5,617,789 discloses a printing press with a counterpressure cylinder and a printing roller cantilevered at one end in a stand. A plate is coupled to the stand and provided with bearings -or receivers for bearings- in order to accomodate the journal of the free end of the printing roller, the plate being able to be swung to either a retracted position, in which the cantilevered roller is freely accessible, or to an operating position, where the journal of the free end of the printing roller is carried by the plate. More in particular, the journal or the bearing is held between a limit stop and an abutment travelling toward the limit stop, the latter being operated through a pneumatic cylinder.
This problem is solved by a roller glueing machine for processing leather goods according to claim 1. Further advantageous features of said glueing machine are recited in the dependent claims.
Features, purposes and advantages of the present invention will appear more clearly from the following description and the attached drawings, relating to not limitative exemplary embodiments.
The various Figures, in which like or similar reference numbers refer to equal or equivalent pares, show:
  • Figure 1: a roller glueing machine according to a first embodiment of the present invention;
  • Figure 2: a roller glueing machine according to a second embodiment of the present invention;
  • Figure 3: a roller glueing machine according to a third embodiment of the present invention; and
  • Figure 4: a roller glueing machine according to a fourth embodiment of the present invention.
With reference to Figure 1, a roller glueing machine 10 according to a first embodiment of the present invention comprises an upper nip roller 12 and a coating counter-roller 14 for the adhesive, which draws from a container (not shown) in which it is partly immersed. The nip roller 12 is assembled on a shaft 16 supported at a first end 18 to the glueing machine, and provided with actuating means for lowering it towards the coating counter-roller 14, for example in the shape of a lever 20 operated by a pedal 22 through a traction cable 24, schematically illustrated by a dashed line, and provided with a return spring (not shown). At the free end 26 of shaft 16, a compensation system is provided for maintaining the shaft horizontal, in the shape of a lever 28 one free end 30 of which, in the lowered position of lever 28, engages the end 26 of shaft 16 pushing it towards the coating counter-roller 14. Bearing means, for example in the shape of a wheel 32 at the free end 30 of lever 28, are provided for the purpose of favouring the rolling of shaft 26. In the embodiment of Figure 1, lever 28 is operated by a traction cable 34 controlled by the same pedal 22 which operates the lever 20 for actuating the nip roller 12; thus, the two levers 20, 28 are operated simultaneously. Finally, there are shown a return spring 36 and a dowel 38 to adjust the position of the lever according, for example, to the thickness of the material being processed.
It must be noted that, with the particular double-angle configuration of the lever shown, the gap between the two rollers 12, 14 is freely accessible from the side corresponding to the free end 26 of shaft 16, thus allowing processing end portions of bulky items.
The embodiment shown in Figure 2 differs from the above one in that levers 20, 28 are actuated through a respective piston and cylinder device, 40, 42 respectively, for example of the pneumatic type. Advantageously, the operation is controlled by a sensor, for example an optical reader 44, which detects the presence of an item in the gap between the nip roller 12 and the coating counter-roller 14.
Figure 3 shows a simplified compensation system wherein a piston and cylinder device 46 directly operates with the free end of its piston rod 48 against the free end 26 of shaft 16, preferably provided with the bearing wheel 32. Also in this case, sensor 44 advantageously controls the operation.
Finally, Figure 4 shows another compensation system wherein the piston rod 52 of a piston and cylinder device 50 is provided with a joint 54 with bearings so as to exert a pull action on the free end 26 of shaft 16, preferably in response to the detection of an item by sensor 44. However, this type of embodiment is not suitable for bulky items since it takes up the insertion side of the gap between the rollers 12, 14, and requires the removal of joint 54 for maintenance, cleaning and replacing of roller 18.
For sake of simplicity, Figures 3 and 4 do not show the actuating means at the supported end 18 of shaft 16, which can be of any traditionally used type, preferably as shown in the embodiment of Figure 2.

Claims (8)

  1. Roller glueing machine (10) for processing leather goods, comprising at least one nip roller (12) supported on a shaft (16), a coating counter-roller (14) for adhesive, and means for actuating said shaft (16) for pressing said at least one nip roller (12) towards said coating counter-roller (14), wherein said shaft (16) is cantilevered at a first end (18), characterised by means for compensating the horizontality of said shaft (16), said compensation means exerting a force at the free end (26) of said shaft (16) towards said coating counter-roller (14).
  2. Roller glueing machine (10) according to claim 1, characterised in that said compensation means comprise a lever (28) in a lowered position of which, one free end (30) thereof engages said free end (26) of said shaft (16) thus forcing it towards said coating counter-roller (14).
  3. Roller glueing machine (10) according to claim 2, characterised in that said free end (30) of said lever (28) is provided with bearing means (32) for the rolling of said shaft (16).
  4. Roller glueing machine (10) according to claim 2 or 3, characterised in that said lever (28) has a double-angle configuration so as to be pivoted from the side of said first supported end (18) of said shaft (16).
  5. Roller glueing machine (10) according to claim 1, characterised in that said compensation means comprises a piston and cylinder device (46, 50), in an end-of-stroke position thereof the end of its piston rod (48, 52) engaging said free end (26) of said shaft (16) thus forcing it towards said coating counter-roller (14).
  6. Roller glueing machine (10) according to claim 5, characterised in that the end of said piston rod (48, 52) is provided with bearing means (32, 54) for the rolling of said shaft (16).
  7. Roller glueing machine (10) according to any of the previous claims, characterised by synchronisation means (22, 44) for actuating said compensation means simultaneously with the actuation of said at least one nip roller (12) by said means for actuating said shaft (16).
  8. Roller glueing machine (10) according to any of the previous claims, characterised by sensor means (44) for detecting the presence of an item inside the gap between said at least one nip roller (12) and said coating counter-roller (14) and for operating, in response to this, said compensation means and said means for actuating said shaft (16).
EP00901317A 1999-01-12 2000-01-04 Roller glueing machine for processing leather goods Expired - Lifetime EP1144122B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1999MI000028A IT1306933B1 (en) 1999-01-12 1999-01-12 ROLLER GLUING MACHINE FOR THE PROCESSING OF LEATHER GOODS
ITMI990028 1999-01-12
PCT/IT2000/000002 WO2000041818A1 (en) 1999-01-12 2000-01-04 Roller glueing machine for processing leather goods

Publications (2)

Publication Number Publication Date
EP1144122A1 EP1144122A1 (en) 2001-10-17
EP1144122B1 true EP1144122B1 (en) 2002-10-02

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ID=11381440

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Application Number Title Priority Date Filing Date
EP00901317A Expired - Lifetime EP1144122B1 (en) 1999-01-12 2000-01-04 Roller glueing machine for processing leather goods

Country Status (8)

Country Link
EP (1) EP1144122B1 (en)
AT (1) ATE225211T1 (en)
AU (1) AU2127900A (en)
DE (1) DE60000532T2 (en)
ES (1) ES2184692T3 (en)
IT (1) IT1306933B1 (en)
PT (1) PT1144122E (en)
WO (1) WO2000041818A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108943864A (en) * 2018-08-09 2018-12-07 芜湖三华包装科技有限公司 A kind of glue application device of paper bag processing
CN108973234A (en) * 2018-08-09 2018-12-11 芜湖三华包装科技有限公司 Sizer is used in a kind of processing of kraft paper bag
CN110665734A (en) * 2019-10-14 2020-01-10 安徽豪鼎金属制品有限公司 Method for improving surface strength of metal plate and equipment adopting method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1043567B (en) * 1975-10-22 1980-02-29 Anic Spa METHOD TO FIREPROOF NONWOVEN FABRICS
DE19516004C2 (en) * 1995-05-02 1997-05-07 Windmoeller & Hoelscher Printing press
DE19624393A1 (en) * 1996-06-19 1998-01-02 Roland Man Druckmasch Overhead mounted printing unit cylinders

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108943864A (en) * 2018-08-09 2018-12-07 芜湖三华包装科技有限公司 A kind of glue application device of paper bag processing
CN108973234A (en) * 2018-08-09 2018-12-11 芜湖三华包装科技有限公司 Sizer is used in a kind of processing of kraft paper bag
CN110665734A (en) * 2019-10-14 2020-01-10 安徽豪鼎金属制品有限公司 Method for improving surface strength of metal plate and equipment adopting method

Also Published As

Publication number Publication date
ATE225211T1 (en) 2002-10-15
PT1144122E (en) 2003-02-28
IT1306933B1 (en) 2001-10-11
WO2000041818A1 (en) 2000-07-20
EP1144122A1 (en) 2001-10-17
ITMI990028A1 (en) 2000-07-12
ES2184692T3 (en) 2003-04-16
AU2127900A (en) 2000-08-01
DE60000532T2 (en) 2003-07-10
DE60000532D1 (en) 2002-11-07

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