BOWIE THICK TESTVORRICHTUNG.

BOWIE-DICK TEST DEVICE

A method of constructing a permanent record test device for testing the efficiency of a steam sterilizer apparatus to create a vacuum satisfying the Bowie-Dick test procedure and the device constructed thereby is disclosed. A sheet of selectively porous material such as one hundred pound blotter paper having a steam sensitive indicator ink printed thereon is laminated between layers of steam and air impermeable polymeric material to substantially occlude the sheet from ambient atmosphere, except for a small metering region. The small metering region may include a hole punched through the laminated sheet. Two parallel and spaced apart strips can be used with a metering hole punched at one end of each of the strips or, alternatively, a metering hole is punched at one end of any one of the strips and the strips can be connected with a fluid passageway at the opposite end of the strips. Strips other then straight strips can be used, e.g., an L-shaped strip can be used with a V-shaped strip.

Bowie-Dick-Testvorrichtung.

BOWIE-DICK TEST DEVICE

W21 A method of constructing a permanent record test device for testing the efficiency of a steam sterilizer apparatus to create a vacuum satisfying the Bowie-Dick test procedure and the device constructed thereby is disclosed. A sheet of selectively porous material such as one hundred pound blotter paper having a steam sensitive indicator ink printed thereon is laminated between layers of steam and air impermeable polymeric material to substantially occlude the sheet from ambient atmosphere, except for a small metering region. The small metering region may include a hole punched through the laminated sheet. Two parallel and spaced apart strips can be used with a metering hole punched at one end of each of the strips or, alternatively, a metering hole is punched at one end of any one of the strips and the strips can be connected with a fluid passageway at the opposite end of the strips. Strips other then straight strips can be used, e.g., an L-shaped strip can be used with a V-shaped strip ...

STEAM STERILIZER TEST INDICATOR

Bowie-Dick-Testvorrichtung.

RECORD STORAGE TEST TOOL AND METHOD FOR FORMING RECORD STORAGE TEST TOOL

PURPOSE: To facilitate the manufacture, and to improve reliability so as to stabilize quality by overlapping porous sheets having a display surface coated with display ink, which reacts with steam, between high molecular material layers, which do not transmit steam and air, at parts except for a measuring part so as to cut the air of the periphery. CONSTITUTION: Display ink 14, which is discolored by the existence of steam, is used, and a mount 12 is formed of a porous material sheet, which is obtained by forming the fiber material into the net material. Layers 20, 22 of impermeable resin film are overlapped with an upper and a lower surfaces and a peripheral part of four edges of the sheet 12, and a range 32 is left as it is not overlapped, and a measuring hole 36 is punched at a position close to an edge 37. This tool 10 is arranged inside a chamber, and when a steam processing is performed in the vacuum condition, the air near an edge 39 is discharged last, and the residual air prevents ...