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    • 1. 发明授权
    • Shrinkable tray with attachable lids
    • 可收缩托盘,带有可附盖
    • US06478181B1
    • 2002-11-12
    • US09729496
    • 2000-12-04
    • Calvin S. KrupaRobert KnossRichard T. Steichen
    • Calvin S. KrupaRobert KnossRichard T. Steichen
    • B65D4118
    • B65D43/0212B65D2543/00194B65D2543/0025B65D2543/00296B65D2543/00351B65D2543/00527B65D2543/00537B65D2543/0062B65D2543/00694B65D2543/00731B65D2543/00805B65D2543/00842
    • Plastic trays used for baking shrink when in an oven such that lids which attached to the tray prior to baking no longer fit the tray after baking. Since the shrinkage of the tray is known for the temperature range expected during baking, a lid having two sets of locking tabs at different perimeters can be used to secure the lid to the tray. The first perimeter and locking tabs are used before the tray is baked and the second perimeter and locking tabs used after the tray baked. In this manner a tray with food therein can have a lid secured thereto before baking when the tray is one size and the same lid secured thereto after baking. The lid is removed during baking and reapplied after baking thus protecting the food in the tray before and after baking. Alternatively the tray may have two lid engaging perimeters for attaching the trays to the lids. The first tray perimeter used before baking and the second after baking. The lid would have one perimeter for engaging the tray before and after baking. The location for attaching the trays to the lids can be located anyplace around the trays and lids. The means for attaching the trays to the lids may be by inserting a concave portion into a concave portion, by inserting a portion of the tray or lid under tabs of the lid or tray or any other means of inserting lockingly securing the trays and lids together. The trays and/or lids may change size for a variety of reasons, including thermal expansion and contraction, thermoplastic shrinkage, or load stresses. The dual size containers will fit the lid to the tray before and after the size changes.
    • 用于烘烤的塑料托盘在烘箱中收缩,使得在烘烤之前附着到托盘上的盖子在烘烤后不再适合托盘。 由于在烘烤期间预期的温度范围已知托盘的收缩,所以可以使用具有不同周长的两组锁定片的盖将盖固定到托盘。 在托盘被烘烤之前使用第一周边和锁定片,并且在托盘烘烤之后使用第二周边和锁定片。 以这种方式,其中具有食物的托盘可以在烘烤之前固定到其上,同时托盘是一个尺寸的,并且烘烤后固定到其上的盖子。 在烘烤期间将盖子取出并在烘烤后重新施加,从而在烘烤之前和之后保护托盘中的食物。 或者,托盘可以具有两个盖接合周边,用于将托盘附接到盖子上。 烘烤前使用的第一个盘周长,烘烤后第二个。 在烘烤之前和之后,盖将具有用于接合托盘的一个周边。 将托盘连接到盖子的位置可以位于托盘和盖子周围的任何位置。 用于将托盘附接到盖子的装置可以通过将凹部插入到凹部中,通过将托盘或盖子的一部分插入到盖或托盘的突出部上或将托盘和盖子锁定在一起的任何其他装置插入 。 托盘和/或盖可能由于各种原因改变尺寸,包括热膨胀和收缩,热塑性收缩或载荷应力。 双重尺寸的容器将在大小变化之前和之后将盖子装入托盘。