OSTANI, Maurizio (Via Canova 15, Montebelluna TV, I-31044, IT)
CLAIMS
1. Process for manufacturing gloves (2) and the like, characterized in that it comprises the following operating steps: - inserting a lining (3) into a glove (2), wherein glue is arranged between the glove (2) and the lining (3); inserting a plug (1) in the zone of the wrist of the glove (2) provided with the lining
(3); pumping a fluid into the lining (3) for pressing it from the inside against the inner surface of the glove (2).
2. Process according to the previous claim, characterized in that said glue is thermoactivable.
3. Process according to the previous claim, characterized in that said fluid pumped into the lining (3) is heated for activating the thermoactivable glue. 4. Process according to the previous claim, characterized in that said fluid is heated at a temperature higher than 100° C.
5. Process according to one of the previous claims, characterized in that said fluid is pumped into the lining (3) through at least one inlet (4) made in the plug
(I)- 6. Process according to one of the previous claims, characterized in that said fluid comes out of the lining (3) through at least one outlet (5) made in the plug (1). 7. Process according to one of the previous claims, characterized in that said fluid is conveyed toward one or more fingers of the glove (2) by means of one or more extensions (8) arranged in the lining (3). 8. Process according to the previous claim, characterized in that said extensions comprise a series of tubes (8) ending close to the fingertips of the glove (2).
9. Process according to the previous claim, characterized in that said tubes (8) are connected to the inlet (4) or the outlet (5) of the plug (1).
10. Process according to one of the previous claims, characterized in that said fluid is pumped into the lining (3) with an overpressure higher than 5 kPa, in particular comprised between 25 kPa and 35 kPa.
11. Process according to one of the previous claims, characterized in that when said fluid is pumped into the lining (3), the glove (2) is surrounded by a rigid shell (11) whose inner cavity has a shape substantially complementary to the outer shape of the glove (2). 12. Process according to one of the previous claims, characterized in that when said fluid is pumped into the lining (3), the glove (2) is heated from the outside.
13. Process according to the previous claim, characterized in that the glove (2) is heated in an oven at a temperature higher than 80° C, in particular comprised between 100° and 130°. 14. Process according to the previous claim, characterized in that further fluid is pumped into the lining (3) after the glove (2) has been extracted from the oven.
15. Process according to one of the previous claims, characterized in that the lining (3) comprises at least one membrane made of a semipermeable material, in particular polyurethane. 16. Process according to one of the previous claims, characterized in that the lining (3) is a three-dimensional, breathable and elastomeric glove, which is made of a single piece.
17. Process according to one of the previous claims, characterized in that said glue is distributed on the outer surface of the lining (3) in a uniform and discontinuous manner, in particular is a glue pattern.
18. Process according to one of the previous claims, characterized in that said fluid is air.
19. Process according to one of claims 1 to 17, characterized in that said fluid is nitrogen. 20. Process according to one of the previous claims, characterized in that the fingertips of the glove (2) and of the lining (3) are glued to each other before inserting the plug (1).
21. Process according to one of the previous claims, characterized in that a sleeve (15) is temporarily fastened to the wrist of the glove (2) before inserting the plug (1).
22. Process according to one of the previous claims, characterized in that air is sucked from the lining (3) before pumping the fluid.
23. Device for manufacturing gloves (2) and the like, characterized in that it is provided with a plug (1) suitable for being inserted into the zone of the wrist of a glove (2) provided with a lining (3) which is arranged inside the same glove, as well as means (9) suitable for pumping a fluid into the lining for pressing it from the inside against the inner surface of the glove (2).
24. Device according to the previous claim, characterized in that it comprises a heater (10) suitable for heating the fluid pumped into the lining (3).
25. Device according to the previous claim, characterized in that it the heater (10) heats the fluid at a temperature higher than 100 0 C.
26. Device according to one of claims 23 to 25, characterized in that the plug (1) has a substantially cylindrical or frutstoconical shape, in particular with a substantially elliptical section.
27. Device according to one of claims 23 to 26, characterized in that the plug (1) is provided with at least one inlet (4) for pumping the fluid into the lining (3).
28. Device according to one of claims 23 to 27, characterized in that the plug (1) is provided with at least one outlet (5) for discharging the fluid pumped into the lining (3).
29. Device according to the previous claim, characterized in that a valve (6) is arranged along the outlet (5) for blocking, reducing or adjusting the flow of the fluid discharged through this duct (5).
30. Device according to one of claims 23 to 29, characterized in that it comprises a closure device (7), in particular a collar, suitable for being tightened around the glove (2, 15) in the zone of the wrist for preventing the passage of the fluid between the lining (3) and the plug (1 ).
31. Device according to one of claims 23 to 30, characterized in that it comprises one or more extensions (8) suitable for conveying the fluid pumped into the lining (3) toward one or more fingers of the glove (2).
32. Device according to the previous claim, characterized in that said extensions (8) are connected to the inlet (4) or the outlet (5) of the plug (1).
33. Device according to claim 31 or 32, characterized in that said extensions comprise a series of tubes (8) ending close to the fingertips of the glove (2).
34. Device according to the previous claim, characterized in that the diameter of tubes (8) is shorter than 10 mm.
35. Device according to one of claims 23 to 34, characterized in that said means (9) suitable for pumping the fluid into the lining (3) comprise a pump (9) which exerts an overpressure higher than 5 kPa, in particular comprised between 25 kPa and 35 kPa.
36. Device according to one of claims 23 to 35, characterized in that it comprises a rigid shell (11) whose inner cavity has a shape substantially complementary to the outer shape of a glove (2).
37. Device according to the previous claim, characterized in that the rigid shell (11) is provided with one or more heaters (12) for heating the glove (2) from the outside.
38. Device according to claim 36 or 37, characterized in that the rigid shell (11) comprises two half-shells (Ha, 1 Ib).
39. Device according to the previous claim, characterized in that the two half-shells (Ha, l ib) are divided by a plane which crosses the palm and four fingers, thumb excluded, of the glove (2).
40. Device according to one of claims 27 to 39, characterized in that the inlet (4) is provided with a valve (13) and a connector (14), so that the plug (1) can be separated from the pumping means (9) while keeping the overpressure in the lining (3).
41. Glove (2) or the like, characterized in that it is manufactured by means of the process and/or the device according to one of claims 1 to 40. |
PROCESS AND DEVICE FOR MANUFACTURING GLOVES AND THE LIKE
The present invention relates to a process for manufacturing gloves and the like, for example mittens. The present invention also relates to a device which carries out said process, as well as gloves or the like obtained with this process or device.
WO 01/56415 discloses two rigid lasts for manufacturing gloves, wherein the first last is similar to a hand with the thumb only and the second last is similar to a hand with the remaining four fingers. A lining, for example a waterproofing sheath provided with a semipermeable membrane, and then a glove are tightly fitted first onto the first last and then onto the second last. In these two consecutive steps the lining is stretched until it assumes the conformation of the lasts so as to adapt to the glove when the latter is fitted onto the lasts. The lasts are internally heated for activating a layer of a thermoactivable adhesive arranged on the outer surface of the lining, after which they pump air into the lining for joining it to the glove, cooling the glue and facilitating its extraction.
This known manufacturing process is relatively difficult and slow to be carried out, since it requires the forced insertion of the lining and then of the glove on two separate lasts, which is not easy especially with the second last and with relatively rigid three-dimensional gloves made of leather. Furthermore, two relatively complex metal lasts must be made for each size of glove to be manufactured, so as to noticeably increase the manufacturing costs.
It is therefore an object of the present invention to provide a process and a device which are free from said disadvantages. Said object is achieved with a process and a device, whose main features are described in claims 1 and 23, respectively, while other features are described in the remaining claims.
Thanks to their particular plug, the process and the device according to the present invention allow to press the lining into the glove without using lasts which are expensive and difficult to be used.
For decreasing the manufacturing times, the fluid pumped into the lining is a hot gas and is preferably directed toward the fingers of the glove by means of particular extensions, so as to improve and speed up the joining between lining and glove in the
critical zone of the fingertips.
The glove is preferably inserted in a rigid shell for avoiding its expansion when the fluid is pumped into the lining.
According to a particular aspect of the invention, the rigid shell is made up of two particular half-shells and/or is provided with heaters for improving and speeding up the joining between lining and glove.
According to a particular aspect of the invention, it has been found that particular three-dimensional, breathable, elastomeric gloves made of a single piece, as described in WO 2004/060179, can be advantageously employed as waterproofing sheaths in the process according to the present invention for waterproofing gloves made of leather and/or fabric.
A further advantage of the process and the device according to the present invention lies not only in their greater productivity with respect to the known processes, but also in their relatively low production costs, so that they can be employed not only in the industrial production, but also in the handicraft production.
In an embodiment, the gloves inflated and provided with the plug are inserted into a oven for activating a thermoactivable glue sprayed between the lining and the glove.
Further advantages and features of the process and the device according to the present invention will become clear to those skilled in the art from the following detailed and non-limiting description of three embodiments thereof with reference to the attached drawings, wherein:
- figure 1 shows the first embodiment of the device applied to a glove;
- figure 2 shows the second embodiment of the device applied to a glove;
- figure 3 shows the rigid shell applied to the device of figure 2; - figure 4 shows a view sectioned along plane IV-IV of figure 3; and
- figure 5 shows the third embodiment of the device applied to a glove.
Referring to figure 1, it is seen that the device according to the first embodiment of the invention comprises a substantially cylindrical- or frutstoconical-shaped plug 1, in particular with a substantially elliptical section, suitable for being inserted into the zone of the wrist of a glove 2 provided with a lining 3 which is arranged inside the glove itself. The surface of lining 3 turned toward glove 2 is provided with a layer of a
thermoactivable glue. The glue is distributed on the outer surface of lining 3 in a uniform and discontinuous manner, in particular with a pattern made up of polyurethane glue dots having a diameter comprised between 0,1 mm and 2 mm and a density comprised between 10 dots/cm 2 and 200 dots/cm 2 . Lining 3 preferably comprises at least one membrane made of a semipermeable material, i.e. permeable to water vapor and impermeable to water, in particular polyurethane, which has a thickness preferably comprised between 5 μm and 100 μm, is preferably non-porous, i.e. it carries out the passage of water vapor by osmosis, and elastic with a coefficient of elongation higher than 50%, in particular 100%. The surface of the membrane which is not turned toward glove 2 can be fastened to a fabric or a similar material, preferably elastic. Further information about the semipermeable membrane which can be used for lining 3 is contained in WO 00/22948 and WO 02/11571. Lining 3 can comprise one or more sheets of this semipermeable membrane, which are shaped and mutually joined along the edges. In another embodiment of the invention, lining 3 comprises a particular three- dimensional breathable and elastomeric glove, which is made of a single piece, as disclosed in WO 2004/060179.
Plug 1 is provided with at least one inlet 4 for pumping a fluid, in particular air, into lining 3, so as to press it from the inside against the inner surface of glove 2. Plug 1 is also provided with at least one outlet 5 for discharging the fluid pumped into lining 3. A valve 6 can be arranged along outlet 5 for blocking, reducing or adjusting the flow of the fluid discharged through this duct. A closure device, in particular a collar 7, can be tightened around glove 2 in the zone of the wrist for preventing the passage of fluid between lining 3 and plug 1.
Referring to figure 2, it is seen that in a second embodiment of the invention one or more extensions suitable for conveying the fluid pumped into lining 3 toward one or more fingers of glove 2 are connected to inlet 4 or outlet 5. In particular, said extensions comprise a series of five semirigid tubes 8 which are connected to inlet 4 and end close to the fingertips of glove 2. The diameter of tubes 8 is preferably shorter than 10 mm.
Referring to figures 3 and 4, it is seen that the fluid is sucked from the outside and pumped by a pump 9 with an overpressure higher than 5 kPa, in particular comprised between 25 kPa and 35 kPa, after which is heated at a temperature higher than 100° C
by a heater 10 which is arranged outside plug 1 and is connected to inlet 4. The compressed and heated fluid inflates lining 3 by heating the thermoactivable adhesive, so as to join lining 3 to glove 2. Glove 2 is preferably surrounded by a rigid shell 11 whose inner cavity has a shape substantially complementary to the outer shape of glove 2. Rigid shell 11 comprises two half-shells 11a, l ib divided by a plane which crosses the palm and four fingers, thumb excluded, of glove 2. Rigid shell 11 is made of metal, in particular aluminum, or plastic resistant to a temperature higher than at least 70° C. Rigid shell 11 can also be provided with one or more heaters 12 for heating glove 2 from the outside. Referring to figure 5, it is seen that in a third embodiment of the invention plug 1 is not provided with an outlet, while inlet 4 is provided with a valve 13 and a connector 14, so that plug 1 can be separated from pump 9 after valve 13 is closed for keeping the overpressure in lining 3. With this arrangement, a plurality of gloves 2 under pressure can be inserted into an oven at a temperature higher than 80° C, in particular comprised between 100° and 130°. The fluid pumped into lining 3 is preferably nitrogen, so as to reduce its expansion when it is heated by the heating means. Further fluid can be pumped into lining 3 after glove 2 has been extracted from the oven, so as to keep it extended during the cooling.
Before inserting lining 3 into glove 2, the latter is turned inside out and a thermoactivable glue is applied on the fingertips of glove 2. Further glue is sprayed on the rest of the inner surface of glove 2 and/or on the outer surface of lining 3. Glove 2 is turned again, so that its outer surface is turned outwards, and then lining 3 is inserted into glove 2. Before inserting plug 1, the fingertips of glove 2 and of lining 3 are glued by applying a hot plate on the fingertips. After plug 1 is inserted, the air inside glove 2 is sucked and then nitrogen under pressure is pumped. A sleeve 15 can be temporarily fastened to the wrist of glove 2, for example by means of a seam 16, so that collar 7 is applied on sleeve 15 and does not crease glove 2. At the end of the manufacturing process, sleeve 15 is unstitched and the portion of lining 3 protruding from the wrist of glove 2 is cut out. Further modifications and/or additions may be made by those skilled in the art to the hereinabove disclosed and illustrated embodiments of the invention while remaining
within the scope of the following claims. In particular, the process and the device according to the present invention can be employed also for manufacturing mittens or other clothing items similar to the gloves.