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    • 81. 发明授权
    • Method for producing an acetal copolymer
    • 缩醛共聚物的制造方法
    • US5741866A
    • 1998-04-21
    • US646238
    • 1996-05-06
    • Shyuzi YahiroMinoru Yamamoto
    • Shyuzi YahiroMinoru Yamamoto
    • C08G2/18C08G4/00C08G63/91
    • C08G2/18C08G4/00
    • Disclosed is a method for producing an acetal copolymer, which comprises copolymerizing trioxane with a cyclic ether in the presence of a cation-active catalyst, wherein the cyclic ether is obtained by adding to a fresh cyclic ether containing a peroxide derived therefrom in an amount of 15 ppm by weight or less in terms of hydrogen peroxide at least one sterically hindered phenol in an amount of from 10 to 500 ppm by weight, based on the weight of said fresh cyclic ether. By the method of the present invention, it has become possible not only to stably and efficiently produce an acetal copolymer having high thermal stability, but also to stably conduct a post-treatment of the obtained acetal copolymer for deactivating the remaining catalyst and changing the unstable terminals to stable terminals, so that an ultimate acetal copolymer having high thermal stability can be stably obtained.
    • PCT No.PCT / JP95 / 00306 Sec。 371日期:1996年5月6日 102(e)日期1996年5月6日PCT提交1995年2月28日PCT公布。 WO95 / 23171 PCT出版物 日期:1995年8月31日公开是生产缩醛共聚物的方法,其包括在阳离子活性催化剂存在下使三恶烷与环醚共聚,其中环醚通过加入到含有过氧化物的新鲜环状醚 相对于所述新鲜环状醚的重量,以过氧化氢为基准,其量为15重量ppm以下,至少一种空间位阻酚为10〜500重量ppm。 通过本发明的方法,不仅可以稳定有效地制备具有高热稳定性的缩醛共聚物,而且可以稳定地进行所得缩醛共聚物的后处理以使剩余的催化剂失活并改变不稳定 端子到稳定的端子,从而可以稳定地获得具有高热稳定性的最终的缩醛共聚物。
    • 87. 发明授权
    • Printer
    • 打印机
    • US09205686B2
    • 2015-12-08
    • US13625311
    • 2012-09-24
    • Hiroaki KitaMinoru Yamamoto
    • Hiroaki KitaMinoru Yamamoto
    • B41J15/04B65H16/06
    • B41J15/042B65H16/06
    • A printer includes a first case and a second case, a paper containing portion is formed in the first case and contains a paper roll, a paper holder is provided in the paper containing portion and hold the paper roll, a pair of supporting members are provided in the paper holder and hold both ends of the paper roll, with each of the supporting members holding one of the ends, a contacting portion is provided in the paper holder and is thicker than are the supporting members, and a first projection projects in the paper containing portion from the first case toward the paper holder and is positioned, in the axial direction of the paper roll, between the contacting portion and a wall surface of the first case located on the side of the contact portion and is able to come into contact with the contacting portion.
    • 打印机包括第一壳体和第二壳体,在第一壳体中形成纸容纳部分并且包含纸卷,纸容纳部分设置在纸容纳部分中并保持纸卷,提供一对支撑构件 在纸张保持器中并保持纸卷的两端,每个支撑构件保持一个端部,在纸夹中设置接触部分,并且比支撑构件厚,并且第一突出部突出在 纸容纳部从第一壳体朝向纸保持器,并且在纸卷的轴向方向上位于接触部分和位于接触部分侧的第一壳体的壁表面之间,并且能够进入 与接触部分接触。