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.
• 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.
• 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 fact, 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.
• 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.
• - 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
• FIG. 4 a roller glueing machine according to a fourth embodiment of the present invention.
• 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)
• Bakery Products And Manufacturing Methods Therefor (AREA)
• Working Measures On Existing Buildindgs (AREA)
• Disintegrating Or Milling (AREA)
• Noodles (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11381440

Family Applications (1)

Country Status (8)

Families Citing this family (3)

Citations (3)

• 1999
  • 1999-01-12 IT IT1999MI000028A patent/IT1306933B1/it active
• 2000
  • 2000-01-04 DE DE60000532T patent/DE60000532T2/de not_active Expired - Fee Related
  • 2000-01-04 WO PCT/IT2000/000002 patent/WO2000041818A1/en active Application Filing
  • 2000-01-04 AT AT00901317T patent/ATE225211T1/de not_active IP Right Cessation
  • 2000-01-04 EP EP00901317A patent/EP1144122B1/en not_active Expired - Lifetime
  • 2000-01-04 PT PT00901317T patent/PT1144122E/pt unknown
  • 2000-01-04 ES ES00901317T patent/ES2184692T3/es not_active Expired - Lifetime
  • 2000-01-04 AU AU21279/00A patent/AU2127900A/en not_active Abandoned

Patent Citations (3)

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