Patent ID: 8875627
Filing Date: 2014-11-04
Classification: B41F

Abstract:
1. Machine ( 10 ) for the in-line transformation of wipes or tissues, comprising at least one unwinding group ( 12 ) for one or more reels ( 14 ) of web-shaped material ( 100 ), which constitutes the base support for said wipes or tissues, at least one printing group ( 18 ), arranged immediately downstream of said unwinding group ( 12 ), said printing group ( 18 ) being capable of heat-printing decorative patterns, trademarks and/or inscriptions with a paraffin or natural wax-based ink (W) and/or mixtures thereof on said web-shaped material ( 100 ) and at least one folding and cutting group ( 20 ), arranged downstream of said printing group ( 18 ), wherein said printed web-shaped material ( 100 ) is folded and cut to form said wipes or tissues, said printing group ( 18 ) being provided with at least one melting or fluidifying group for feeding and heating said ink (W), which needs to be fluidified to be able to be printed onto said web-shaped material ( 100 ), and with one or more heating means ( 38 ; 58 , 60 , 62 ) capable of avoiding the cooling, and therefore the solidification, of said ink (W) fed by said melting group before said ink (W) has been printed onto said web-shaped material ( 100 ) wherein said printing group ( 18 ) is able to operate according to the silk-screen printing technique and comprises at least one printing cylinder ( 28 ) connected to the frame of said printing group ( 18 ) by means of an outer sleeve ( 34 ) that defines an inner cavity ( 36 ) with substantially axial extension, wherein said inner cavity has a first end and a second end, wherein said melting or fluidifying group is able to feed the ink (W) into said inner cavity ( 36 ) of the printing cylinder ( 28 ), wherein said heating means ( 38 ) comprise a plurality of ducts ( 40 ) able to blow hot air inside said inner cavity ( 36 ) of the printing cylinder ( 28 ) said ducts being positioned so that a first duct blows hot air into said first end of said inner cavity ( 36 ) and a second duct blows hot air into said second end of said inner cavity ( 36 ), and wherein said printing group ( 18 ) comprises sensor means for controlling the temperature of the air blown inside said inner cavity ( 36 ) of the printing cylinder 28 .