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1. 发明授权

US4428723A Apparatus for stretching a continuously advancing synthetic-resin web and feeding same stepwise to a thermoforming machine 失效
标题翻译：用于拉伸连续进行的合成树脂纤维网并逐步加入到热成型机的装置
公开(公告)号：US4428723A
公开(公告)日：1984-01-31
申请号：US349994
申请日：1982-02-18
申请人： Alfons W. Thiel, deceased , by Erika Thiel, heiress
发明人： Alfons W. Thiel, deceased , by Erika Thiel, heiress
IPC分类号： B29C51/18 , B29C51/26 , B29C51/42 , B29C17/02
CPC分类号： B29C51/261 , B29C51/18 , B29C51/423
摘要： An apparatus used in combination with an input machine that continuously delivers a stretchable web to an input location and with an output machine that operates stepwise to treat the web at a stationary output location has a reciprocal support frame between the locations and displaceable in an upstream direction toward the upstream location and a downstream direction toward the downstream location. Longitudinal and transverse stretchers are carried on the frame and have web-engaging elements displaceable relative to the frame in the downstream direction for stretching the web and holding the web in stretched condition. A storing or tempering stage between the frame and the upstream location supports a loop of the web so that as the frame moves back and forth this loops grows and diminishes. A drive connected to the stretchers continuously advances the web in the downstream direction relative to the frame at a web-travel rate. An actuator is connected to the frame to move same when moving in the upstream direction substantially at the web-travel rate. Thus the web stops moving at the downstream location during such upstream movement of the frame.
摘要翻译：一种与输入机组合使用的装置，其将可拉伸幅材连续地输送到输入位置，并且使用在步进方式上操作以在固定输出位置处理幅材的输出机器具有在该位置之间的可互换支撑框架，并且可在上游方向上移位朝向下游位置的上游位置和下游方向。纵向和横向担架承载在框架上，并且具有可沿着下游方向相对于框架移动的腹板接合元件，用于拉伸腹板并将腹板保持在拉伸状态。在框架和上游位置之间的存储或回火阶段支撑网的环，使得当框架来回移动时，该环增长和减小。连接到担架的驱动器以卷筒纸行进速率相对于框架在下游方向上连续前进纸幅。驱动器连接到框架，以在大体上以卷筒纸行进速率沿上游方向移动时移动。因此，在框架的这种上游移动期间，纸幅在下游位置停止移动。

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