JP2000351462A5 - - Google Patents
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- Publication number
- JP2000351462A5 JP2000351462A5 JP1999165870A JP16587099A JP2000351462A5 JP 2000351462 A5 JP2000351462 A5 JP 2000351462A5 JP 1999165870 A JP1999165870 A JP 1999165870A JP 16587099 A JP16587099 A JP 16587099A JP 2000351462 A5 JP2000351462 A5 JP 2000351462A5
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- roll
- coated paper
- coated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007664 blowing Methods 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
Description
このような設定状態のままでシートPである塗工紙等を搬送しようとすると、塗工紙の用紙間密着力が非常に高いことから、複数枚の塗工紙がまとめて搬送され、重送となって下流側に搬送されてしまう。ここで、塗工紙とは、用紙を原紙とし、その両面または片面に印刷適正の改良を目的として、塗料の一種である塗工カラーを塗布した複合シートである。この塗工紙は表面平滑度が非常に高く、接したときの塗工紙同士の間隔が非常に狭い状態にあり、その間隔に空気を通さない状態となって生じた負圧が維持され、その結果、用紙間の密着が高くなることから、一般の普通紙やコピー用紙に対する接触圧では塗工紙を捌くことができない。
このとき、ただ単純に接触圧を上げて塗工紙を捌こうとすると、一般の普通紙やコピー用紙に対する接触圧に対して約30倍もの接触圧が必要となることが発明者による実験で明確になった。また一方で、塗工紙に対する摩擦係数を維持するために、耐磨耗性の低い材質を用いて各ロールを形成し、かかる状態にて用紙に対する接触圧を増すと、各ロールの寿命が非常に短くなることが明らかになった。
If an attempt is made to convey coated paper or the like that is a sheet P in such a setting state, since the adhesion between the coated papers is very high, a plurality of coated papers are conveyed together, and the weight of the coated paper is reduced. It would be conveyed to the downstream side of a transmission. Here, the coated paper is a composite sheet in which a paper is used as a base paper and a coating color, which is a kind of paint, is applied to both sides or one side for the purpose of improving printability. This coated paper has a very high surface smoothness, and the interval between the coated papers when in contact is in a very narrow state, and the negative pressure generated in a state where air is not passed through the interval is maintained, As a result, the close contact between the sheets becomes high, so that the coated paper cannot be sprinkled with the contact pressure on ordinary plain paper or copy paper.
At this time, an experiment by the inventor has shown that if the contact pressure is simply increased to spread the coated paper, a contact pressure of about 30 times the contact pressure for ordinary plain paper or copy paper is required. It became clear. On the other hand, in order to maintain the coefficient of friction against the coated paper, if each roll is formed using a material with low wear resistance, and the contact pressure against the paper is increased in such a state, the life of each roll will be very long. It became clear that it became shorter.
そこで、本実施の形態では、塗工紙等の密着性の高いシートPに対する密着解消手段の1つとして、エアー吹出装置71を設け、高圧のエアーをシートPに吹き付けることにより、シートPの密着を解消させ、各ロールの接触圧を増すことなくシートPの供給を可能としている。ここで、図4に示したエアー吹出装置71のエアー吹出口73は、その開口下端が積載された最上位のシートPより下方となり、その開口上端は最上位のシートPより上方となるように構成されている。このエアー吹出口73から例えば断続的にエアーを吹き付けることで、図5に示すような揚力がシートPに対して作用し、シートPは1枚毎に捌かれた状態となる。この状態で引込ロール61を駆動することにより、シートPは略1枚毎に繰り出され、複数枚がまとまって繰り出された場合でも搬送ロール62と捌きロール63により1枚毎に捌かれて搬送される。
Therefore, in the present embodiment, as one of the adhesion eliminating means for the highly adhesive sheet P such as coated paper, an air blowing device 71 is provided, and high pressure air is blown onto the sheet P, whereby the adhesion of the sheet P is achieved. The sheet P can be supplied without increasing the contact pressure of each roll. Here, the air outlet 73 of the air blowing device 71 shown in FIG. 4 is such that the lower end of the opening is lower than the uppermost sheet P loaded and the upper end of the opening is higher than the uppermost sheet P. It is configured. For example, when air is intermittently blown from the air outlet 73, a lift as shown in FIG. 5 acts on the sheet P, and the sheets P are rolled one by one. By driving the drawing roll 61 in this state, the sheet P is fed out approximately one by one, and even when a plurality of sheets are fed out together, the sheets P are rolled and conveyed one by one by the conveying roll 62 and the separating roll 63. The
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16587099A JP3891244B2 (en) | 1999-06-11 | 1999-06-11 | Sheet feeding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16587099A JP3891244B2 (en) | 1999-06-11 | 1999-06-11 | Sheet feeding device |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2000351462A JP2000351462A (en) | 2000-12-19 |
JP2000351462A5 true JP2000351462A5 (en) | 2005-05-19 |
JP3891244B2 JP3891244B2 (en) | 2007-03-14 |
Family
ID=15820557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16587099A Expired - Fee Related JP3891244B2 (en) | 1999-06-11 | 1999-06-11 | Sheet feeding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3891244B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005335837A (en) * | 2004-05-24 | 2005-12-08 | Fuji Xerox Co Ltd | Paper feeding device |
JP4613782B2 (en) * | 2005-10-07 | 2011-01-19 | 富士ゼロックス株式会社 | Paper feeding device and image forming apparatus |
JP2009084052A (en) | 2007-09-14 | 2009-04-23 | Ricoh Co Ltd | Sheet feeder and image forming device |
JP5422615B2 (en) * | 2011-07-22 | 2014-02-19 | 富士ゼロックス株式会社 | Sheet supply apparatus and image forming apparatus |
JP2011236058A (en) * | 2011-07-22 | 2011-11-24 | Fuji Xerox Co Ltd | Sheet feeder and image forming apparatus |
-
1999
- 1999-06-11 JP JP16587099A patent/JP3891244B2/en not_active Expired - Fee Related
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