Unwinding machine with splicer
AssigneeBachofen + Meier AG Maschinenfabrik
InventorWalter Schmid
Life of this patent
Estimating the term…
Abstract
An unwinding machine for wound rolls, e.g. of paper, has holders which can be swung alternately into the unwinding and the splicing positions. A new roll in the splicing position has its leading end engaged by a groove roller which draws the new web between itself and the old web during continued unwinding thereof and a blade roller is pressed against the groove roller to cut through both webs and attach an adhesive strip across the trailing end of the old web and the leading edge of the new web. The residue of the old web continues to be wound up on the blade roller while a small residue of the new web is picked up by the groove roller and carried away.
Claims14
An unwinding machine for rolls wound with a web to be drawn from said rolls, said unwinding machine comprising:
- means forming two roll holders alternatingly displaceable between a splicing position and an unwinding position;
- means forming a path of a web unwound from a roll in said unwinding position and extending past a roll in said splicing position;
- a blade roller along said path having a web-severing blade projecting from a periphery of the blade roller;
- a groove roller along a side of said path opposite said groove roller across said web, said groove roller having at least one axially extending groove positioned to receive said blade, said means forming said path including means for guiding the web unwound from said roll in said unwinding position and a new web unwound from said roll in said splicing position between said blade roller and said groove roller;
- means for displacing said blade roller and said groove roller relatively and synchronously driving same to urge said rollers against said webs and press said blade through said webs into said groove;
- and
- means for displacing said groove roller toward said roll in said splicing position for picking up a leading edge of said new web therefrom and drawing said new web between said groove roller and said blade roller.
A method of unwinding rolls wound with a web to be drawn from said rolls, said method comprising the steps of:
- (a) continuously unwinding a roll wound with a web in an unwinding position and supported by one of two roll holders alternatingly displaceable between a splicing position and an unwinding position;
- (b) guiding the web unwound from a roll in said unwinding position past a roll in said splicing position;
- (c) picking up a leading end of a new web from said roll in said splicing position on a groove roller and entraining said new web on said groove roller through a gap between said groove roller and a blade roller and through which said web unwound from said roll in said unwinding position passes;
- and
- (d) while said webs are continuously displaced through said gap, pressing said webs between said blade roller and said groove roller to drive a blade of said blade roller through said webs into a groove of said groove roller, thereby severing said webs and applying an adhesive strip across a leading edge of said new web and a trailing edge of the web unwound from said roll in said unwinding position.
Dependencies are inferred from the claim text.