公开(公告)号：US11858161B2

公开(公告)日：2024-01-02

申请号：US17769869

申请日：2020-11-11

Applicant: FUTURA S.P.A.

Inventor： Gabriele Betti ,  Ciro Guarini

IPC: B26D7/12 ,  B26D1/16

CPC classification number: B26D7/12 ,  B26D1/16 ,  B26D2210/11

Abstract: A cutting machine for the transversal cutting of paper material logs, including: a structure on which are moved the logs; a cutting unit including a blade; at least one sharpening unit with two grinding wheels; a positioning device for positioning the grinding wheels with respect to the blade. The positioning device includes: a primary carriage and two secondary carriages supported by the primary carriage; a sensor for detecting the radius of the blade and configured to stop the primary carriage when the grinding wheels are arranged with the respective axes at a given distance from the axis of the blade. In a second phase of positioning the grinding wheels, the secondary carriages are controlled so as to bring the abrasive side of the wheels into contact with the blade.

公开(公告)号：US10035235B2

公开(公告)日：2018-07-31

申请号：US15038842

申请日：2014-10-17

Applicant: FUTURA S.P.A.

Inventor： Giovacchino Giurlani ,  Ciro Guarini

IPC: B24B3/46 ,  B24D15/08 ,  B24B3/36

CPC classification number: B24B3/46 ,  B24B3/36 ,  B24D15/082

Abstract: Sharpening device for sharpening blades mounted on cutting machines, comprising two grinding wheels (2, 3) supported by respective movable supports (20, 30) adapted to move said grinding wheels (2, 3) from a standby or rest configuration in which the grinding wheels (2, 3) are positioned at a predetermined distance from the blade (4) to an active configuration in which the grinding wheels (2, 3) are in contact with a cutting edge (40) of the blade (4) and vice-versa along a predetermined trajectory (R2, R3). The movable supports (20, 30) are adapted to move said grinding wheels (2, 3) along respective arcuate trajectories, such that the contact of each grinding wheel (2, 3) with a respective side of the cutting edge (40) of the blade (4) is progressive, whereby the contact between the grinding wheels and the blade increases progressively when the device passes from the standby rest configuration to the active configuration.