公开(公告)号：US4137049A

公开(公告)日：1979-01-30

申请号：US795582

申请日：1977-05-10

申请人： Thomas W. Couch ,  James A. Harvey ,  Gerardus L. J. Tummers

发明人： Thomas W. Couch ,  James A. Harvey ,  Gerardus L. J. Tummers

IPC分类号： G01K3/02 ,  G01K11/12 ,  G04F7/00 ,  G07C1/00 ,  G01D13/00 ,  G01N31/06 ,  G01N31/22

CPC分类号： G07C1/00 ,  G01K11/12 ,  G01K3/02 ,  G04F7/00

摘要： An indicator device for use as a time indicator or a time-temperature indicator. A container is provided for housing a frangible capsule and a porous carrier. A vapor generating chemical is enclosed in the capsule. A mixture, including a second chemical, a pH change responsive indicator, and a gel forming agent are impregnated in the porous carrier. The pH of the vapor is different from the second chemical. A gel is formed from the mixture and provides uniform dispersion of the second chemical and the indicator throughout the porous carrier, as well as provides an impedance to the vapor as it moves through the porous carrier. The device is thus useful as an elapsed time indicator for certain temperature ranges as well as a time-temperature indicator for wider temperature ranges.

摘要翻译： 用作时间指示器或时间温度指示器的指示器。 提供容器用于容纳易碎胶囊和多孔载体。 蒸汽发生化学品被封装在胶囊中。 包含第二化学品，pH变化响应指示剂和凝胶形成剂的混合物浸渍在多孔载体中。 蒸汽的pH不同于第二种化学品。 由混合物形成凝胶，并且使第二化学品和指示剂均匀分散在整个多孔载体中，并且当蒸气移动通过多孔载体时，提供阻抗。 因此，该装置可用作特定温度范围的经过时间指示器以及用于较宽温度范围的时间温度指示器。

公开(公告)号：US4145918A

公开(公告)日：1979-03-27

申请号：US720853

申请日：1976-09-07

申请人： Thomas W. Couch ,  Erick-Pierre Fournier ,  James A. Harvey ,  Derk T. A. Huibers ,  Howard A. Mercer

发明人： Thomas W. Couch ,  Erick-Pierre Fournier ,  James A. Harvey ,  Derk T. A. Huibers ,  Howard A. Mercer

IPC分类号： G01K11/06

CPC分类号： G01K11/06 ,  Y10S428/913

摘要： A freeze and thaw indicator is provided utilizing the expansion characteristics of water when it undergoes a change from the liquid state to the solid state. An ampul having one side made weaker than its opposite side is substantially filled with water. Indicator paper having ink printed on one side is situated adjacent to the ampul. The indicator paper and ampul are housed in a blister pack plastic container for protecting the ampul from breakage. When the temperature around the indicator reaches the freezing point of water, the ampul breaks. During a subsequent thawing, the water flows on to the indicator paper causing the ink which is printed on one side to wick up, thereby indicating that the freeze or thaw has taken place.

摘要翻译： 当水经历从液态到固态的变化时，利用水的膨胀特性来提供冷​​冻和解冻指示器。 具有比其相对侧弱的一侧的安瓿基本上充满水。 在一侧印有油墨的指示纸位于安瓿附近。 指示纸和安瓿容纳在泡罩包装塑料容器中，用于保护安瓿不被破坏。 当指示器周围的温度达到水的冰点时，安瓿断裂。 在随后的解冻过程中，水流到指示纸上，导致打印在一侧的油墨被弄脏，从而指示已经发生冻结或解冻。