A suction roller structure for an interleaving machine
AssigneeUnited Converting S.R.L.
InventorsGiuseppe LUPI, Angelo TORRI, Gianluca GIOMETTI
Life of this patent
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Abstract
Suction roller structure for the pneumatic transport of sheets inside an interfolding unit, comprising a suction source, an external roller (3) rotating with respect to the cylinder (1) and provided with longitudinal rows of bores (4) angularly spaced and selectively communicating with said internal cavity (2) during the angular rotation of the roller (3), a distribution of pneumatic valves (5) that are normally closed, inserted between said internal cavity (2) and at least one bore (4), cam means (6) operatively associated with the rotation of the roller (3) and arranged to open one or more of said valves (5) at one or more angular positions taken by the roller (3).
Claims13
A suction roller structure to pneumatically transport sheets, the suction roller structure comprising:
- a suction source;
- a rotating external roller comprising longitudinal rows of bores angularly spaced and said longitudinal rows of bores selectively communicating with said suction source during angular rotation of said rotating external roller;
- a distribution of intermediate suction chambers communicating and associated with corresponding longitudinal rows of bores;
- a distribution of pneumatic valves, each of said pneumatic valves being interposed between said suction source and one of said intermediate suction chambers;
- an actuation means operatively associated with said rotation of said rotating external roller and arranged for opening one or more of said pneumatic valves at one or more angular positions taken by said rotating external roller.
An interfolding unit comprising:
- a pair of folding rollers arranged side by side and counter-rotating to operate at a common tangency point on successions of sheets fed according to a staggered position between said pair of folding rollers, at least one of said folding rollers comprising a suction roller structure, said suction roller structure comprising a suction source, a rotating external roller, a distribution of intermediate suction chambers, a distribution of pneumatic valves and an actuation means, said rotating external roller comprising longitudinal rows of bores angularly spaced and said longitudinal rows of bores selectively communicating with said suction source during angular rotation of said rotating external roller, said distribution of intermediate suction chambers communicating and being associated with corresponding longitudinal rows of bores, each of said pneumatic valves being interposed between said suction source and one of said intermediate suction chambers, said actuation means being operatively associated with said rotation of said rotating external roller and arranged for opening one or more of said pneumatic valves at one or more angular positions taken by said rotating external roller.
Dependencies are inferred from the claim text.