Envelope sheet
Another coating part is formed along a sheet short side direction, on a region which is a part of an envelope outer side of a third component sheet and which contacts a flap by folding along a second folding line. A first cutout part and a second cutout part which respectively extend in an extension direction of a first coating part and a second coating part, are respectively formed on both side fringes in the sheet short side direction in the third component sheet. The minimum width of each of the first cutout part and the second cutout part in the sheet short side direction is set longer than a length from the side fringe of the envelope sheet in the sheet short side direction to the inner side fringe of each of the first coating part and the second coating part.
1. An envelope sheet used when manufacturing an envelope, comprising:
n (where n is an integer of three or more) rectangular component sheets adjacently aligned in an envelope unfolding direction; and
(n−1) folding lines for consecutively connecting the n component sheets along the envelope unfolding direction, wherein each folding line consecutively connects adjacent component sheets and extends in an orthogonal direction that is orthogonal to the envelope unfolding direction,
wherein a first component sheet serves as a front sheet or a back sheet of the envelope,
a second component sheet serves as a back sheet or a front sheet of the envelope,
the first component sheet has an openable and closable flap on one end side extending in the envelope unfolding direction,
a first coating part and a second coating part coated with pressure-sensitive adhesive are provided on an envelope inner side and respectively extend along the envelope unfolding direction on fringes of the first component sheet, the second component sheet, and a third component sheet, and
another coating part coated with another adhesive provided on an envelope outer side of the third component sheet for closing the flap, the another coating part extends along the orthogonal direction and contacts the flap but not an adhesive when the envelope sheet is folded along the second folding line,
wherein a first cutout part and a second cutout part extend in the envelope unfolding direction, and are respectively provided on fringes of the third component sheet,
the first coating part and the second coating part on the third component sheet are bonded to a part of the first coating part and a part of the second coating part on the second component sheet when the envelope sheet is folded along the second folding line,
and the first coating part and the second coating part on the first component sheet are bonded to a remaining part of the first coating part and a remaining part of the second coating part on the second component sheet via the first cutout part and the second cutout part on the third component sheet when the envelope sheet is folded along the first folding line.
2. The envelope sheet according to claim 1 , wherein a minimum width of each of the first cutout part and the second cutout part in the orthogonal direction is set longer than a length from a side fringe of the third component sheet in the orthogonal direction to an inner side edge of each of the first coating part and the second coating part.
3. The envelope sheet according to claim 2 , wherein the first cutout part and the second cutout part of the third component sheet are asymmetric with respect to a centerline in the orthogonal direction.
4. The envelope sheet according to claim 1 , wherein a first chamfer and a second chamfer are respectively provided on tips of both side fringes in the orthogonal direction in the first component sheet.
5. An envelope sheet used when manufacturing an envelope, comprising:
n (where n is an integer of three or more) rectangular component sheets adjacently aligned in an envelope unfolding direction; and
(n−1) folding lines for consecutively connecting the n component sheets along the envelope unfolding direction, wherein each folding line consecutively connects adjacent component sheets and extends in an orthogonal direction that is orthogonal to the envelope unfolding direction,
wherein a first component sheet serves as a front sheet or a back sheet of the envelope,
a second component sheet serves as a back sheet or a front sheet of the envelope,
the first component sheet has an openable and closable flap on one end side extending in the envelope unfolding direction,
a first coating part and a second coating part coated with pressure-sensitive adhesive are provided on an envelope inner side and respectively extend along the envelope unfolding direction on fringes of the first component sheet, the second component sheet, and a third component sheet, and
another coating part coated with another adhesive provided on an envelope outer side of the third component sheet for closing the flap, the another coating part extends along the orthogonal direction and contacts the flap but not an adhesive when the envelope sheet is folded along the second folding line,
wherein a first cutout part and a second cutout part extend in the envelope unfolding direction, and are respectively provided on fringes of the third component sheet,
and a minimum width of each of a portion of the first cutout part and the second cutout part extending in the orthogonal direction is set longer than a length from each of the fringes of the third component sheet to each edge of the first coating part and the second coating part in the orthogonal direction.
6. The envelope sheet according to claim 1 , wherein the another adhesive is a water paste.
7. An envelope used when manufacturing an envelope, comprising:
n (where n is an integer of three or more) rectangular component sheets adjacently aligned in an envelope unfolding direction; and
(n−1) folding lines for consecutively connecting the n component sheets along the envelope unfolding direction, wherein each folding line consecutively connects adjacent component sheets and extends in an orthogonal direction that is orthogonal to the envelope unfolding direction,
wherein a first component sheet serves as a front sheet or a back sheet of the envelope,
a second component sheet serves as a back sheet or a front sheet of the envelope,
the first component sheet has an openable and closable flap on one end side extending in the envelope unfolding direction,
a first coating part and a second coating part coated with pressure-sensitive adhesive are provided on an envelope inner side and respectively extend along the envelope unfolding direction on fringes of the first component sheet, the second component sheet, and a third component sheet, and
another coating part coated with another adhesive is provided on an envelope outer side of the third component sheet for closing the flap, the another coating part extends along the orthogonal direction and contacts the flap but not an adhesive when the third component sheet is folded along a folding line, and
wherein a first cutout part and a second cutout part extend in the envelope unfolding direction, and are respectively provided on fringes of the third component sheet.