Patent ID: 11945643
Assignee: JMS CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC B  A | IPC A  B

Claim 0:
1. A pressure bag comprising:
a housing chamber configured to house a bag-shaped container in which a liquid substance is contained; and
a hermetically-sealed pressure chamber,
the pressure bag having, at one end, an opening through which the bag-shaped container is placed into and taken out of the housing chamber, having a bottom portion on an opposite side to the opening, and having first and second lateral side seal portions along first and second lateral sides of the pressure bag that connect the opening and the bottom portion to each other,
the pressure bag comprising a folded, flexible inner sheet formed of a single continuous sheet, and a folded, flexible outer sheet formed of a single continuous sheet located on an opposite side of the inner sheet from the housing chamber, the flexible inner sheet and the flexible outer sheet having folding-back portions that are disposed at a bottom portion side of the pressure bag that is opposite the opening of the pressure bag,
wherein the flexible outer sheet is longer than the flexible inner sheet in a direction in which the first and second lateral side seal portions face each other, and the flexible inner sheet has a first surface that faces the housing chamber and a second surface that faces the flexible outer sheet, with outer peripheral edges of the second surface of the flexible inner sheet being entirely joined to the outer sheet, and the opening extending between facing portions of the first surface of the flexible inner sheet,
each of the first and second lateral side seal portions has a first zone in which the flexible inner sheet is present and a second zone in which the flexible inner sheet is not present, with the second zone present at a peripheral edge side of the first zone,
in the first zones of each of the first and second lateral side seal portions, a respective lateral side of the flexible inner sheet is joined to a respective lateral side of the flexible outer sheet, with the first surface of the lateral side of the flexible inner sheet not joined to itself,
in the second zones of each of the first and second lateral side seal portions, the respective lateral side of the flexible outer sheet is joined to itself without intervening flexible inner sheet,
the pressure chamber is present between the flexible inner sheet and the flexible outer sheet,
each of the flexible inner sheet, the flexible outer sheet, and the pressure chamber extends continuously from a first side of the housing chamber to a second side of the housing chamber via the bottom portion, and
the pressure bag is configured such that, when a fluid is injected into the pressure chamber, the pressure chamber is inflated and applies pressure to a bag-shaped container housed in the housing chamber so as to squeeze liquid substance out of the bag-shaped container.