Method for producing seamless shoe upper

Abstract

A method for producing a seamless shoe upper includes the following steps of: providing a covering piece, a lining piece, and first and second screen-printing jigs having first and second screen portions respectively; surface treating the covering piece using a first treating agent through the first screen portion and the lining piece using a second treating agent through the second screen portion; distributing an adhesive onto the covering piece and the lining piece respectively through the first and second screen portions, so as to form first and second adhesive layers thereon; and bonding the covering piece with the lining piece by overlapping and pressing the first and second adhesive layers together.

What is claimed is: 
     
         1 . A method for producing a seamless shoe upper, comprising the following steps of:
 (a) providing a covering piece, a lining piece, a first screen-printing jig having a first screen portion that corresponds in shape to a bottom surface of the covering piece, and a second screen-printing jig having a second screen portion;   (b) surface treating the bottom surface of the covering piece using a first treating agent through the first screen portion, and a top surface of the lining piece using a second treating agent via the second screen portion;   (c) drying the covering piece and the lining piece so as to remove the first and second treating agents on the bottom surface of the covering piece and the top surface of the lining piece, respectively;   (d) distributing an adhesive onto the bottom surface of the covering piece and the top surface of the lining piece respectively through the first and second screen portions, so as to form first and second adhesive layers respectively on the bottom surface of the covering piece and the top surface of the lining piece;   (e) drying the first and second adhesive layers; and   (f) bonding the bottom surface of the covering piece with the top surface of the lining piece by overlapping and pressing the first and second adhesive layers together.   
     
     
         2 . The method of  claim 1 , wherein, in step (a), the second screen portion of the second screen-printing jig corresponds in shape to the first screen portion of the first screen-printing jig. 
     
     
         3 . The method of  claim 2 , wherein, in step (a), the second screen portion of the second screen-printing jig is mirror-symmetric in shape to the first screen portion of the first screen-printing jig. 
     
     
         4 . The method of  claim 1 , wherein, in step (a), the covering piece is made of plastic, artificial leather, natural leather or combinations thereof. 
     
     
         5 . The method of  claim 4 , wherein, in step (a), the lining piece is made of textile, plastic, artificial leather, natural leather, or combinations thereof. 
     
     
         6 . The method of  claim 1 , further comprising: in step (a),
 providing a first substrate and a second substrate, the first substrate having a plurality of first positioning portions and a first top surface formed with a first positioning groove that corresponds in shape to the bottom surface of the covering piece, the second substrate having a plurality of second positioning portions corresponding respectively in position to the first positioning portions and a second top surface formed with a second positioning groove that corresponds in shape to the lining piece,   disposing a first releasable adhesive layer in the first positioning groove, and   disposing a second releasable adhesive layer in the second positioning groove; and prior to step (b),   a step (b1) of placing the covering piece into the first positioning groove of the first substrate to removably retain the covering piece therein by the first releasable adhesive layer, and placing the lining piece into the second positioning groove of the second substrate to removably retain the lining piece therein by the second releasable adhesive layer.   
     
     
         7 . The method of  claim 6 , wherein:
 in step (a), the first screen-printing jig further has a plurality of engaging segments that are operable to engage respectively the first positioning portions of the first substrate, the second screen-printing jig further has a plurality of engaging segments that are operable to engage respectively the second positioning portions of the second substrate; and   in step (b) and step (d), the first screen-printing jig is positioned with the first substrate through the engagement between the engaging segments of the first screen-printing jig and the first positioning portions of the first substrate, the second screen-printing jig being positioned with the second substrate through the engagement between the engaging segments of the second screen-printing jig and the second positioning portions of the second substrate.   
     
     
         8 . The method of  claim 7 , wherein, in step (a):
 the first substrate includes a first outer plate, and a first inner plate that is disposed on a top surface of the first outer plate and that has a top surface serving as the first top surface of the first substrate, and a through hole serving as at least a portion of the first positioning groove, the first releasable adhesive layer being disposed in the through hole of the first inner plate and on the top surface of the outer plate; and   the second substrate includes a second outer plate, and a second inner plate that is disposed on a top surface of the second outer plate and that has a top surface serving as the second top surface of the second substrate, and a through hole serving as at least a portion of the second positioning groove, the second releasable adhesive layer being disposed in the through hole of the second inner plate and on the top surface of the second outer plate.   
     
     
         9 . The method of  claim 7 , wherein:
 in step (a), the first and second positioning portions respectively of the first and second substrates are through holes, and the first and second engaging segments respectively of the first and second screen-printing jigs are configured in a pin shape; and   step (f) is performed using a pressing apparatus including a bottom mold and a top mold, one of the bottom and top molds being formed with a plurality of pin-like segments each of which engages a respective one of the first positioning portions of the first substrate, and a respective one of the second positioning portions of the second substrate.