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US 9,840,074 B2Granted
Method and device for replacing the printing roller of a printing unit of a printing machine
AssigneeBobst Firenze S.R.L.
InventorsMassimo Bastici, Federico D'Annunzio, Giacomo Maccalli, Mauro Maccalli
Life of this patent
Estimating the term…
Abstract
The present invention relates to a device for replacing the printing roller in a printing unit, in particular for in line rotary flexographic machines.
Claims14
A device for replacing a printing roller of a printing unit, comprising:
- a work station for a first working printing roller associated with a first support spindle;
- a holding station for a second held printing roller associated with a second support spindle;
- a removal station for removing one of the first printing roller and the second printing roller from the support spindle;
- said work station being arranged in a substantially intermediate position between said removal station and said holding station;
- and
- displacement means for displacing said first support spindle from said work station to said removal station and for displacing said second support spindle from said holding station to said work station;
- said displacement means comprising two guides each of which extends from said work station as far as said holding station and said removal station, respectively, said first support spindle and second support spindle being slidably connected to said guides so as to allow the simultaneous displacement of said first printing roller from said work station to said removal station and of said second printing roller from said holding station to said work station, said device being characterized in that it comprises further comprising a support structure which defines two opposite sides, said displacement means being located on a first side, said first and second printing rollers projecting from a second side opposite to said first side, two through-incisions are formed in said support structure, said first spindle and second spindle being each arranged so as to pass through a respective incision so that a first end of each spindle projects from said first side in order to be connected to said displacement means, while a section of each support spindle projecting from said opposite side of said support structure is occupied by said each one of the first printing roller and said second printing roller.
4 more elements
A method for replacing printing rollers of a printing unit, comprising the steps of:
- providing a first working printing roller in a work station, associated with a first support spindle;
- providing a second held printing roller in a holding station, associated with a second support spindle;
- displacing, by means of displacement means, said first support spindle from said work station to a removal station and displacing at the same time, by means of said displacement means, said second support spindle from said holding station to said work station;
- in said removal station removing one of the first printing roller and the second printing roller from said first support spindle;
- and
- wherein said displacement means comprising a pair guides each of which extends from said work station as far as said holding station and from said work station as far as said removal station, said first support spindle and second support spindle being slidably connected respectively to one of said guides, said displacement means also comprising actuating means configured to perform the independent displacement of each support spindle along the respective guide so as to allow the simultaneous displacement of said first printing roller from said work station to said removal station and of said second printing roller from said holding station to said work station,
- said displacement means further comprising a support structure which defines two opposite sides, said displacement means being located on a first side, said first and second printing rollers projecting from a second side opposite to said first side, two through-incisions are formed in said support structure, said first spindle and second spindle being each arranged so as to pass through a respective incision so that a first end of each spindle projects from said first side in order to be connected to said displacement means, while a section of said each support spindle projecting from said opposite side of said support structure is occupied by said each one of the first printing roller and said second printing roller.
4 more elements
Dependencies are inferred from the claim text.