1. A tongue-lid package, comprising:
a cuboidal box body with an open end at the top,
a tongue-lid rotatably connected to a rear edge of the open end by a lid hinge, the tongue-lid including a lid adapted to close the open end and a tongue connected to a distal end of the lid by a tongue hinge, and arranged such that the tongue overlies a front wall of the box body when the lid is in position to close the open end, and a cuboidal inner pack enclosed in the box body, wherein
the inner pack includes
an article, and
an envelope formed by folding a wrapper to enclose the article,
the envelope having seams formed by joining edges of the wrapper together to keep the inner pack airtight;
the seams include
a transverse seam formed by joining upper and lower edges of the wrapper together, the transverse seam extending across the width of the inner pack on a front or rear face of the inner pack, and
a pair of vertical seams each formed by folding and joining a lateral edge of the wrapper to itself, the vertical seams extending on opposite side faces of the inner pack, respectively;
the upper and lower edge sections of the transverse seam of the inner pack are joined and bonded together inclusive of distal edges thereof, and triangular sections formed during gusset folding of the wrapper are folded inward of the inner pack;
the inner pack further includes a to-be-separated section that forms an access opening for exposing the article when the tongue-lid is opened for the first time; and
the to-be-separated section is delimited by vertical separation lines made of a pair of fragile lines extending parallel to each other from an upper position on the front face of the inner pack across a top face of the inner pack up to a rear edge of the top face, adjacent to said lid hinge; a transverse separation line made of a fragile line extending between first ends of the vertical separation lines located in the front face of the inner pack; and the rear edge of the top face, which is located between second ends of the vertical separation lines, the rear edge including no fragile line, the to-be-separated section being bonded to an inner surface of the tongue-lid.
2. The tongue-lid package according to claim 1, wherein the transverse seam and the vertical seams are each in the form of a fin seal.
3. The tongue-lid package according to claim 2, wherein the transverse seam and the vertical seams are seams formed by heat-sealing.
4. The tongue-lid package of claim 1, wherein lateral side portions of the package, on each side of the inner pack, are gusset-folded to form triangular sections which are folded inward of the inner pack.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A manufacturing method for a coil spring, comprising a first shot peening process and a second shot peening process to be performed after the first shot peening process,
the first shot peening process comprising causing a first shot to impinge on a spring wire at a first projectile speed, thereby producing a compressive residual stress such that a peak part of the compressive residual stress exists within the spring wire,
the second shot peening process comprising causing a second shot to impinge on the spring wire at a second projectile speed lower than the first projectile speed and with kinetic energy lower than that of the first shot, thereby increasing the compressive residual stress in a region near the surface to be higher than the peak part of the compressive residual stress.
2. The manufacturing method for a coil spring according to claim 1, wherein the size of the second shot is smaller than that of the first shot.
3. The manufacturing method for a coil spring according to claim 1, wherein the size of the second shot is equal to that of the first shot.
4. The manufacturing method for a coil spring according to claim 1, wherein the first shot peening process and the second shot peening process are performed at treatment temperatures from 150 to 350\xb0 C.
5. The manufacturing method for a coil spring according to claim 2, wherein the first shot peening process and the second shot peening process are performed at treatment temperatures from 150 to 350\xb0 C.
6. The manufacturing method for a coil spring according to claim 3, wherein the first shot peening process and the second shot peening process are performed at treatment temperatures from 150 to 350\xb0 C.