Package making – With fugitive preconditioning of cover material
Reexamination Certificate
1999-04-22
2001-05-22
Sipos, John (Department: 3721)
Package making
With fugitive preconditioning of cover material
C053S202000, C053S546000, C053S551000, C053S389200
Reexamination Certificate
active
06233903
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention belongs to a technical field of multiple automatic packing machines capable of automatically seal-molding a plurality of stick-like packing products at a time, and particularly, it relates to a packing film feeder suited to be used for such a multiple automatic packing machine.
As disclosed for example in U.S. Pat. Nos. 5,634,324, 5,408,807, etc., the conventional multiple automatic packing machine is constructed such that operations of slitting, vertical sealing, lateral sealing, filling of material to be packed and cutting are carried out with respect to rolls of packing material formed from a uniformly printed wide sheet film in accordance with the number of row.
The construction of the above conventional multiple automatic packing machine will be described in detail with reference to FIG.
3
. Reference character F denotes a take-up roll with a printed wide packing material taken up thereon, AS, AT denote packing material supply rollers rotatable by a motor (not shown), BX . . . denote slitters for slitting the packing material FX into a plurality of packing films Fa . . . , and Ca, Cb denote guide rollers.
Similarly, reference character D . . . denote feed pipes for filling material to be packed laterally equally spacedly disposed in side by side relationship, E . . . denote forming members for forming incoming packing films Fa . . . around the feed pipes D . . . , X denotes a vertical heat sealer for vertically sealing opposite end edges of the respective packing films Fa . . . into a sleeve-shape as a whole, and Y denotes a lateral heat sealer for applying a lateral seal to the vertically sealed sleeve-like packing films Fa . . . When this lateral heat sealer Y performs a lateral sealing, the material to be packed is filled into each of the packing films Fa . . . which has been seal molded into a bag-like configuration through each of the feed pipes D . . . Then, the lateral heat sealer Y performing a lateral sealing to each of the packing films Fa . . . is moved downwardly by one pack portion to withdraw each of the packing films Fa . . . by one pack portion.
Thereafter, the lateral heat sealer Y is laterally opened to release a lateral sealing and in that state, it is raised back to a position ready to perform a lateral sealing. In that position, the lateral heat sealer Y performs a lateral sealing once again to tightly seal a mouth of each sealed bag filled with the material to be packed and a cutter (not shown) vertically cuts a center line portion of the lateral sealing. By this, one cycle of multiple sealing operations is completed.
In
FIG. 3
, reference character TN denotes a hopper containing a material to be packed, Da . . . denote upper end inlet ports of the feed pipes D . . . inserted into a bottom portion Ta of this hopper TN, Ma . . . denote rotary shafts whose lower end portions are inserted into the feed pipes D from the inlet ports Da . . . , Ms . . . denote material filling screws formed on lower end portions of the rotary shafts Ma . . . inserted into the feed pipes D . . . , and HP generally denotes an automatic packing portion including the heat sealers X, Y.
Similarly, reference character M . . . denote motors for rotating the rotary shafts Ma . . . disposed on an upper surface portion of the hopper TN. When the screw Ms is rotated within the feed pipe D, the material to be packed contained in the hopper TN is taken into the feed pipe D through the inlet port Da. Then, the material to be packed is smoothly an forcibly filled into the packing film Fa which has been seal molded into a bag-like configuration through the feed pipe D having a small diameter. Even a material to be packed, which is in the form of powder or in a viscous state, can be supplied under compression in an extremely stable manner by rotation of the screw Ms.
In
FIGS. 2 and 3
, reference characters P . . . denote packed products each of which has been seal molded into a stick-like configuration by the multiple automatic packing machine, Pa . . . denote vertical seal portion, and Pc, Pb denote upper and lower lateral seal portions cutting into two by a cutter.
As mentioned above, according to the conventional multiple automatic packing machine of
FIG. 3
, a number of stick-like packing products P . . . can be packed automatically at a time. However, there is a need of providing rotational drive motors M . . . on the upper end portions of the respective rotary shafts Ma . . . in order to rotate the screw Ms for filling a material to be packed into each feed pipe D and in addition, there is a need of enlarging a distance between each adjacent rotary shafts Ma . . . , i.e., a distance between each adjacent feed pipes D . . . so that the motor M . . . will not interfere with each other. The enlargement of the distance gives rise to the problems to be described hereinafter.
Since the packing films Fa . . . , which have been slit by the slitters Bx . . . , are advanced straight ahead, they cannot be directly delivered to and form around the feed pipes D . . . which are arranged side by side relationship at an enlarged distance therebetween as mentioned above. Eventually, it becomes necessary to forcibly enlarge the distance between each adjacent feed pipes D . . . of the filling device in a lateral direction in such a manner to coincide with the distance Fb between each adjacent packing films Fa . . . as shown in FIG.
3
. As a consequence, the packing film Fa is degraded in quality by traces of wrinkles and folds, thus resulting in poor final products.
SUMMARY OF TIE INVENTION
It is, therefore, an object of the present invention to provide a packing film feeder for a multiple automatic packing machine in which when an elongated stick-like packing product is seal molded by slitting a wide sheet-like packing material into a plurality of packing films and then delivering them into an automatic packing portion, the packing films, which have been slit, can be directly straightly fed into the automatic packing portion without a need of forcibly enlarging the distance between each adjacent packing films in conformity with the distance between each adjacent material filling device.
In order to achieve the above object, there is essentially provided in a multiple automatic packing machine comprising slitter means for slitting a wide sheet-like packing material supplied from a take-up roll into a plurality of packing films, heat sealing means for seal molding each of the packing films into an elongated bag-like configuration by a vertical heat sealer and a lateral heat sealer, and material filling means for filling a material to be packed into each of the packing films which has been seal molded into an elongated bag-like configuration through a feed pipe with a filling screw disposed therein which screw is rotatable by a motor, the slitting, heat sealing and material filling operations being repeatedly performed in a consecutive manner by the slitter means, heat sealing means and material filling means, respectively, thereby a plurality of stick-like packing products are seal molded at a time automatically and in a consecutive manner,
(1) the feed pipes constituting the material filling means is preliminarily spacedly arranged in side by side relationship so that the motors for rotating the screws will not interfere with each other, a packing material feed portion comprising the take-up roll and the slitter means is disposed at a different angle in a lateral direction with respect to an automatic packing portion comprising the material filling means and the heat sealing means, and each of the packing films which has been slit by the slitter means and conveyed is trained over a plurality of direction-changing rollers arranged in side by side relationship in a slightly shifted manner in a conveying direction, thereby each of the packing films is changed in direction towards and fed to the automatic packing portion (claim
1
),
(2) the direction-changing rollers are each shifted in the conveying direction of the packing films by a distance equal to a d
Sanko Machinery Co., Ltd.
Sipos John
Stevens Davis Miller & Mosher LLP
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