子分类：
- B31B2219/02： .卷筒纸、纸张或纸袋的送进或定位
- B31B2219/14： .切割、穿孔、冲孔、切成长条、切毛边
- B31B2219/22： .在压力下将纸张材料成型,而不是靠折叠
- B31B2219/23： .硬化、加固纸袋
- B31B2219/25： .表面刻痕
- B31B2219/26： .折叠纸张或卷筒纸
- B31B2219/28： .展开和膨胀压扁的纸袋
- B31B2219/29： .封闭纸袋
- B31B2219/60： .对置表面或边缘的连接;用胶带粘贴
- B31B2219/61： .润湿;烘干;冷却;加热;消毒
- B31B2219/62： .涂敷;浸渍;防水处理;去涂层
- B31B2219/88： .印刷或压花
- B31B2219/90： .成型或附加辅助装置
- B31B2219/92： .递送
- B31B2219/94： .涉及机械特殊的布置或其部件的相关排列
- B31B2219/95： .控制;调整;测量;改善安全性
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | Ready to load bag pack, method of forming and system | US308860 | 1994-09-19 | US5484376A | 1996-01-16 | Randolph D. Prader; Graham Smith |
| A thermoplastic film bag pack where each bag has a bottom, front, rear, and gusseted side walls, an inside and outside surface and a cut-edge mouth portion. The mouth portion has double film loop handles as integral extensions of the walls at its opposite ends. The external surface of the bag at the cut-edge region of the mouth between handles has been subjected to a corona discharge treatment to such an extent that adjacently facing cut-edge regions will be releasably adherent until a moderate force separates them. This condition provides for effective dispensing of grocery bags. A method of forming the bags and a system for dispensing is also disclosed. | ||||||
| 2 | Method for cleaning bag machinery | US788002 | 1991-11-05 | US5230744A | 1993-07-27 | David A. Smith; Clark M. Woody; Philip G. Velez; Herbert B. Geiger; Charles R. Amos, Jr. |
| A method and apparatus for continuous cleaning of bag making machinery is provided. A single roll with a cleaning material attached thereto contacts a rotating drum to remove debris from the surface thereof. When the portion of the cleaning material in contact with the drum becomes saturated with debris, the roll is rotated to present fresh cleaning material to the surface of the drum. The compact design of the cleaning apparatus permits its use in the limited space found around bag making machinery. | ||||||
| 3 | Apparatus for forming loops in tube sections for making sacks for the purpose of compensating for different lengths of sections | US71362 | 1979-08-30 | US4285685A | 1981-08-25 | Fritz Achelpohl |
| Sections of bag-making material are successively and intermittently fed by double belt conveyors to arrive beneath a vertically reciprocatable push member which engages each section by suction and forms a central loop in each section while its ends are yieldingly engaged by brake shoes co-operating with side supports. | ||||||
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