Abstract: [Problem] To provide a hardness tester capable of measuring hardness accurately without removing a surface layer and also provide a hardness testing method. [Solution] An initial test load which is arbitrarily changed from a reference value is applied to the surface of a sample by an indenter 11, a major test load obtained by adding an additional test load to the initial test load is applied thereto, and the load is returned to the initial test load. The difference in depth of penetration of the indenter between the first and second two initial test loads is referenced to determine test hardness of the sample based on a Rockwell hardness computing equation. Correction is made for deviation of hardness from the thus determined test hardness due to a change in the initial test load from the reference value.

Abstract: A method of and a device for forming blisters in which a web material consisting a thermoplastic resin that is supplied to a rotary forming drum is heated and deformed by heat in accordance with the configuration of cavities provided on the rotary forming drum. A predetermined tension is applied forming web material while feeding it. When the rotary forming drum consists of a polygonal drum, each peripheral surface of the drum is formed as a curved surface extending along an arc whose radius is larger than that of the circumscribed circle of the polygon. This invention can be used in a packing device for foods, drugs, etc.

Abstract: A device for forming blisters in which a web material including a thermoplastic resin that is supplied to a rotary forming drum is heated and deformed by heat in accordance with the configuration of cavities provided on the rotary forming drum. A predetermined tension in the range of 5 kg/215 mm to 50 kg/215 mm is applied to the web material while feeding it. When the rotary forming drum consists of a polygonal drum, each peripheral surface of the drum is formed as a curved surface extending along an arc whose radius is larger than that of the circumscribed circle of the polygon. This invention can be used in a packing device for foods, drugs, etc.

Abstract: A method of and for forming blisters in which a web material including a thermoplastic resin that is supplied to a rotary forming drum is heated and deformed by heat in accordance with the configuration of cavities provided on the rotary forming drum. A predetermined tension is applied to the web material while feeding it. When the rotary forming drum consists of a polygonal drum, each peripheral surface of the drum is formed as a curved surface extending along an arc whose radius is larger than that of the circumscribed circle of the polygon. This invention can be used in a packing device for foods, drugs, etc.