Abstract: A compound packing container consisting of an outer casing made of a paper material having an inner bag member arranged to be contained therein. The outer casing has a series of adjacent first, second, third and fourth side panels arranged to be formed into a tubular drum portion with first, second, third and fourth upper flaps and first, second, third and fourth lower flaps extending respectively upwards and downwards from the side panels through an upper and a lower horizontal fold. A pair of opposite vertical folds are made in the vertical center portions of the first side panel, the first upper flap and the first lower flap and in the vertical center portions of the third side panel, the third upper flap, and the third lower flap.

Abstract: A closure arrangement adaptable for an easy open type container including a score line wherein a crossing position of the score line portion lying on the longitudinal axis of a pulling tab passing through the center of a rivet is a minimum distant point from the center of the rivet. The score line portion extends from the minimum distant point right and left and projects outwardly in the region between a first subsidiary line crossing at right angles to the longitudinal axis at the minimum distant point and a third subsidiary line passing through the center of the rivet and extending in parallel with the first subsidiary line, so as to form a pair of swelling score line sections on both sides of the rivet. In this manner, the initial opening force can be decreased, and an easy opening closure can be made even if the score residual is made thicker than that in a conventional closure.

Abstract: A method of and an apparatus for testing the internal pressure of a sealed container carried on a conveyor belt by striking the container with an electromagnetic pulse thereby causing its wall to vibrate, and to check the internal pressure of the sealed container based upon the frequency of the vibratory sound produced by the sealed container. The vibratory sound is converted to an electrical signal by an electroacoustic transducer and is returned to a container striking device in a feedback path thereby to strike repetitively the sealed container with the same frequency of the vibratory sound. The repetitive striking produces continuously without damping a vibratory sound at a frequency commensurate with the natural frequency of vibration of the container. The testing of the internal pressure of the sealed container can be carried out in a stable manner with increased accuracy. A reject system is responsive to the vibratory frequency to permit passage of or to remove the container from the conveyor belt.

Abstract: In a can body forming process and equipment therefor, the cooling action to be added to the joining portions at the opposite ends of a can body blank is effected only at the lower part of the can forming cylinder so that said joining portions can be joined substantially without undergoing internal strain and with a higher forming accuracy.

Abstract: In a can body forming process and equipment therefor, the cooling action to be added to the joining portions at the opposite ends of a can body blank is effected only at the lower part of the can forming cylinder so that said joining portions can be joined substantially without undergoing internal strain and with a higher forming accuracy.

Abstract: A can forming method and apparatus wherein cut-burrs of a can blank are removed from the ends thereof an adhesive film is stuck onto the preheated ends of the blank and, then, said ends are subjected to high-frequency induction heating for melting said films to join said ends together in such a manner as to prevent edge effect and associated deformations from occurring, thereby to form a lapped seam having a remarkably high adhesive strength substantially without pin-hole formation.

Abstract: A lapped seam can having a high safety characteristic used as containers of soft drinks or beer wherein the cut-burrs at the end of the inner end portion of the can blank are completely removed so that micro-leak passages apt to occur in the lapped seam can are shut off, thereby permitting a long term storage of the can content without deterioration by preventing metal from being dissolved out from said inner end portion.

Abstract: A can forming method and apparatus wherein cut-burrs of a can blank are removed from the ends thereof and an adhesive film is stuck onto the preheated ends of the blank and, then, said ends are subjected to high-frequency induction heating for melting said films to join said ends together in such a manner as to prevent edge effect and associated deformations from occurring, thereby to form a lapped seam having a remarkably high adhesive strength substantially without pin-hole formation.