Sheet-feeding device and sheet-feeding method
AssigneeZuiko Corporation
InventorMasato Hiroyasu
Life of this patent
Estimating the term…
Abstract
A first shaft control section controls a first support shaft so that a sheet is unwound from the first roll at a predetermined running speed. A second shaft control section executes an adjustive control of adjusting at least one of a rotation start time and a rotational acceleration of the second support shaft so that, when a first joining target mark on the sheet of the first roll moves to a first reference position, a second joining target mark on an outer peripheral surface of the second roll arrives at a second reference position in a rotational direction thereof, and a peripheral speed of the second roll coincides with the running speed of the sheet of the first roll.
Claims16
A sheet supply apparatus for sequentially unwinding a sheet from a first roll of sheet and a second roll of sheet for sheet supply, the sheet supply apparatus comprising:
- a first support shaft which rotatably supports the first roll at a center position thereof,
- a second support shaft which rotatably supports the second roll at a center position thereof,
- a joining mechanism which joins the respective sheets of the first roll and the second roll to each other by a pressing operation of pressing the sheet run from the first roll rotating in association with rotation of the first support shaft to an adhesive provided on an outer peripheral surface of the second roll rotating in association with rotation of the second support shaft;
- and
- a controller which controls the rotation of each of the first support shaft and the second support shaft so that the respective sheets of the first roll and the second roll are joined to each other via the adhesive in a state where a predetermined first joining target mark among a plurality of registration marks provided at a constant interval in a sheet conveyance direction on the sheet of the first roll faces a second joining target mark which is a registration mark near the adhesive on the outer peripheral surface of the second roll, wherein
- the controller includes:
- an instructive signal output section which outputs a control instructive signal for instructing the joining mechanism to perform the pressing operation;
- a first shaft control section which controls the rotation of the first support shaft in response to the control instructive signal so that the sheet is unwound from the first roll for the sheet supply at a predetermined running speed;
- and
- a second shaft control section which controls the rotation of the second support shaft in response to the control instructive signal,
- the second shaft control section being configured to execute an adjustive control of adjusting at least one of a rotation start time and a rotational acceleration of the second support shaft so that, when a predetermined length of the sheet of the first roll is unwound therefrom and the first joining target mark moves to a predetermined first reference position after the instructive signal output section outputs the control instructive signal, the second joining target mark on the outer peripheral surface of the second roll arrives at a second reference position corresponding to the first reference position in a rotational direction of the second roll, and a peripheral speed of the second roll coincides with the running speed of the sheet of the first roll.
A sheet supply method for sequentially unwinding a sheet from a first roll of sheet and a second roll of sheet for sheet supply by using a sheet supply apparatus including:
- a first support shaft which rotatably supports the first roll of sheet at a center position thereof;
- a second support shaft which rotatably supports the second roll of sheet at a center position thereof, and a joining mechanism which joins the respective sheets of the first roll and the second roll to each other by a pressing operation of pressing the sheet run from the first roll to an adhesive provided on an outer peripheral surface of the second roll, the sheet supply method comprising:
- a sheet supply step of unwinding the sheet from the first roll at a predetermined running speed by rotating the first support shaft for the sheet supply;
- an adjustment step of adjusting at least one of a rotation start time and a rotational acceleration of the second support shaft so that, when a predetermined first joining target mark among a plurality of registration marks provided on the sheet of the first roll at a constant interval in a sheet conveyance direction moves to a predetermined first reference position by unwinding a predetermined length of the sheet from the first roll, a second joining target mark which is a registration mark that locates near the adhesive on the outer peripheral surface of the second roll arrives at a second reference position corresponding to the first reference position in a rotational direction of the second roll, and a peripheral speed of the second roll coincides with the running speed of the sheet of the first roll;
- and
- a joining step of causing the joining mechanism to perform the pressing operation so that the respective sheets of the first roll and the second roll are joined to each other via the adhesive in a state where the first joining target mark on the sheet of the first roll faces the second joining target mark on the outer peripheral surface of the second roll.
Dependencies are inferred from the claim text.