Manufacturing container or tube from paper; or other manufacturi – Container making – Rigid container
Patent
1989-11-03
1991-10-22
Smith, James G.
Manufacturing container or tube from paper; or other manufacturi
Container making
Rigid container
493309, 493394, B31B 150
Patent
active
050591657
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of erecting a carton blank, a tool for carrying out the method and a carton blank used with the method, this blank including a bottom with side and end walls which can be folded up along crease lines, projecting extensions in the form of corner flaps being provided on the side or end walls, such that when the blank is in an erected state these flaps can be locked with locking means on the respective side or end walls.
One object of the present invention is to provide a method, a tool and a carton blank of the kind mentioned in the introduction, such that very great capacity per time unit can be achieved in erecting the blanks into trays, simultaneously as this can be accomplished very simply and reliably by the tool not having any loose, moving parts which can cause trouble. There is thus also achieved the advantage that the tool operates very quietly, since there are no loose, mechanical devices which can make a noise. The essentially distinguishing features of the invention are disclosed in the following claims.
The invention will now be described in more detail with reference to the accompanying drawings, where
FIG. 1 is a perspective view of a preferred embodiment of the tool in accordance with the present invention,
FIG. 2 is a perspective view of the tool illustrated in FIG. 1, with a blank in accordance with the invention placed thereon and before a plunger associated with the tool is lowered for erecting the blank,
FIG. 3 is a partial perspective view of the tool, from which it will be seen how an insertion flap on the blank is caused to lead into an insertion opening on the end wall, and where a spring loaded opener is used,
FIG. 4 is a partial perspective view of the tool, from which it will be seen how an insertion flap on the blank is caused to lead into an insertion opening on the end wall, when an opener is not used.
FIG. 5 is a partial perspective view of the tool, from which it will be seen the positioning of the bolsters on the plunger, locking rollers for pressing in the locking tongue on the insertion flaps being arranged to act between these rollers,
FIG. 6 is a perspective view of the tool, seen obliquely from below, and illustrating the positioning of the locking rollers,
FIG. 7 is a perspective view seen obliquely from below of the tool without a carton blank, and
FIG. 8 is a development of a carton blank for erection by the method and with the tool in accordance with the invention.
A preferred embodiment of a tool in accordance with the present invention for erecting a carton blank 1 is illustrated in FIGS. 1-7, and a development of a preferred embodiment of the blank 1 in accordance with the present invention is illustrated in FIG. 8. As will be seen from FIG. 8, the blank 1 comprises a bottom 2 with side walls 4 and end walls 5 that can be folded up along crease lines 3, the side walls 4 being provided with projecting extensions in the form of corner flaps 6 which are lockable in an erected state by locking means 7 between the corner flap 6 and coacting end wall 5. The locking means 7 comprises an insertion flap 8 with a locking tongue 11 formed on the respective corner flap 6, together with an insertion opening 10 in the corner area 9 of the coacting end wall 5 when the blank 1 is erected. In the erected state the insertion opening 10 is vertically oriented and stamped out of the blank 1 such as to have an edge part 12 coacting with the locking tongue 11. The insertion flap 8 is insertable in the insertion opening 10 and can be locked thereto with the aid of its locking tongue 11, which is adapted to snap past the edge part 12 and to hook thereon with its end edge 32, the edge part 12 defining the insertion opening 10 closest adjacent the outer end edge 13 of the end wall 5. The locking tongue 11 of the insertion flap 8 is formed by a slit 14, this slit being transverse the side wall 4, and provided with two "tails", giving it an S shape. Each insertion opening 10 is defined nearest the end edge of the end wall 5 by the edge part 12, whic
REFERENCES:
patent: 3521530 (1970-07-01), Pierce, Jr.
patent: 4464155 (1984-08-01), Collura et al.
patent: 4493682 (1985-01-01), Bryson et al.
Lavinder Jack
Smith James G.
Sprinter System AB
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