Device for applying adhesive material to sheets of wrapping material
AssigneeG.D Societa' Per Azioni
InventorsRiccardo Mattei, Marco Brizzi
Life of this patent
Estimating the term…
Abstract
A device for applying adhesive material to card blanks in a packeting machine, comprising a gumming roller and a pressing roller which are substantially mutually tangential and between which the blanks are led in succession to receive traces of adhesive material in predetermined zones. Should the packeting machine halt for a time exceeding a predetermined time limit, detachment means withdraw from the gumming roller that blank disposed between the two rollers in order to prevent it becoming stuck to the gumming roller.
Claims8
A device for applying adhesive material to sheets of wrapping material in a packaging machine, the device comprising:
- a frame;
- a gumming roller;
- a first motor for driving the gumming roller;
- a support element disposed above the gumming roller;
- a pressing roller carried by the support element and driven by the first motor in a direction opposite to that of the gumming roller, the pressing roller and gumming roller being substantially tangential to each other;
- a horizontal bench between the gumming roller and pressing roller, the bench having an interruption corresponding to the tangential portions of the rollers;
- advancing means for advancing successive card blanks along the horizontal bench;
- suction means on the support element, the suction means being located over the gumming roller;
- and timer means for measuring the duration of a stoppage of the device, the timer means activating the suction means and deactivating the first motor a predetermined period after each stoppage, the timer further deactivating the suction means and activating the first motor at the end of the stoppage.
Dependencies are inferred from the claim text.