Patent ID: 8640546
Filing Date: 2014-02-04
Classification: A23L,A61L,B01J,C09B,G01L

Abstract:
1. An assembly for indicating achievement of a selected ambient pressure in a high pressure process for treating a foodstuff using a working fluid, the assembly comprising the foodstuff reliably associated with a pressure sensor device that comprises a base, a sheet, and a plurality of microcapsules, each of the base and the sheet being substantially impermeable to the working fluid, being deformable at the selected ambient pressure, and bearing a substantially flat portion; the substantially flat portions of the base and sheet being disposed in a substantially parallel, opposed conformation defining an overlapping region having lateral dimensions and an average separation distance, the plurality of microcapsules being interposed between the base and the sheet in the overlapping region; the microcapsules containing a color former and having a compressive bursting strength less than the selected ambient pressure; and at least one of the base and the sheet having a viewing portion adapted to permit detection of color former released from the microcapsules by external visual observation of the device, whereby when the assembly is subjected to the selected ambient pressure, at least some microcapsules in the overlapping region burst, the color former is released from the microcapsules, and release of the color former can be detected by external visual observation of the device.