Sheet manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-9738996-B2
Application number	US-201515126612-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	Mar 25, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A sheet manufacturing apparatus can determine if the sheets supplied as feedstock have already been recycled.
The sheet manufacturing apparatus has a supply unit configured to supply feedstock; a defibrating unit configured to defibrate the feedstock; an depositing unit configured to deposit defibrated material defibrated by the defibrating unit; a forming unit configured to form a sheet from a web laid by the depositing unit; a marking unit configured to apply a mark to at least one of the web and the sheet; and a reading unit configured to read the mark imparted to the feedstock when a sheet having mark imparted thereto is supplied as the feedstock.

First claim

The invention claimed is:

1. A sheet manufacturing apparatus comprising:
a supply unit configured to supply feedstock;
a defibrating unit configured to defibrate the feedstock;
a depositing unit configured to deposit defibrated material defibrated by the defibrating unit;
a forming unit configured to form a sheet from a web laid by the depositing unit;
a marking unit configured to apply a mark to at least one of the web and the sheet; and
a reading unit configured to read the mark imparted to the feedstock when a sheet having mark imparted thereto is supplied as the feedstock.

2. The sheet manufacturing apparatus described in claim 1 , wherein the marking unit being disposed to at least one of the depositing unit and the forming unit.

3. The sheet manufacturing apparatus described in claim 1 , wherein the mark being embossment with a protrusion or indent in the surface of the sheet; and the reading unit reading the embossment.

4. The sheet manufacturing apparatus described in claim 1 , wherein the mark being a part with different density than other parts of the sheet; and the reading unit reading the part with different density.

5. The sheet manufacturing apparatus described in claim 1 , wherein the mark imparted to the sheet by the marking unit differing from the mark on the feedstock.

6. The sheet manufacturing apparatus described in claim 1 , wherein the marking unit forming the mark on both front and back sides of the sheet.

Assignees

• Seiko Epson Corp

Inventors

• Yamagami Toshiaki
• Miyasaka Yoichi
• Takahashi Nobuhito

Classifications

• D21G9/0009

  Paper-making control systems · CPC title

• D21C5/02

  Working-up waste paper (mechanical part D21B1/08, D21B1/32) · CPC title

• D21B1/06

  by dry methods · CPC title

• D04H1/732 Primary

  by fluid current, e.g. air-lay · CPC title