US 3815482 A
Equipment for printing, slotting, folding and gluing paperboard container stock includes a printer-slotter unit and a folder-gluer unit. In order to integrate the units for in-line operation and make space available between them for manual adjustment of the slotter heads, an articulated conveyor is connected pivotally to each of the spaced stock conveyors of the folder-gluer unit, for lateral adjustment therewith and for pivotal adjustment between an operative position projecting toward the printer-clotter unit and a retracted position extending upwardly adjacent the folder-gluer unit.
Description (OCR text may contain errors)
United States Patent [191  3,815,482 Nelson June 11, 1974 1 ARTICULATED CONVEYOR I  Inventor: Victor R. Nelson, 2700 S.W. Summit Pnmary Emmmer Ry Lake Dr., Lake Oswego, Oreg. 97034  Filed: Oct. 19, 1972  Appl. No.: 299,110
 US. Cl 93/36 R, 198/122, 198/167  Int. Cl B3lb 1/04, B3lb 1/94  Field of Search 198/122, 167; 93/36 R,
93/1 R, 93 R, 93 C, 93 D, 93 DP  References Cited UNITED STATES PATENTS V 2,540,972 2/1951 Wagner, Jr 93/93 DP 3,127,820 4/1964 Carter 93/93 C 3,143,344 8/1964 Miller et a1. 198/122 X 3,626,561 12/1971 Luce et a1. 931/36 R X 9 3/12 t,H9 t S Q (--11-?-::;----: i9 i/ ?..R.X
Assistant Examiner.lames F. Coan Attorney, Agent, or Firm-Oliver D. Olson  ABSTRACT Equipment for printing, slotting, folding and gluing paperboard container. stock includes a printer-slotter unit and a folder-gluer unit. In order to integrate the units for in-line operation and make space available between them for manual adjustment of the slotter heads, an articulated conveyor is connected pivotally to each of the spaced stock conveyors of the foldergluer unit, for lateral adjustment therewith and for pivotal adjustment between an operative position projecting toward theprinter-clotter unit and a retracted position extending upwardly adjacent the folder-gluer unit.
5 Claims, 2 Drawing Figures 1 ARTICULATED CONVEYOR BACKGROUND .OF THE INVENTION,
This invention relates to the manufacture of printed paperboard containers, and more particularly to an'articulated conveyor for integrating printer-slotter and folder-gluer units for in-line operation.
In the manufacture of printed paperboard containers, particularly corrugated paperboard, it is the usual practice, with printing equipment utilizing slow drying inks, to process the paperboard stock through a printerslotter unit, after initial processing in a corrugator unit, and then to store the printed and slotted stock for a time sufficient to allow the ink to dry, preliminary to further processing through a foldengluer unit. The printer-slotter unit is constructed to enable adjustment of the creaser and slotter heads from the outfeed side of the slotter unit, as required for the production of different sizes and types of containers. However, this procedure increases the cost of production because of such factors of the cost of labor in manipulating the stock, the floor space required for storage of the stock, and the time involved in transporting the stock to storage and then from storage to subsequent processing through the folder-unit unit.
With the advent of fast-drying inks, the integration of a printer-slotter unit anda folder-gluer unit for continuous in-line operation has been achieved by the close coupling of a folder-gluer unit with a new type of printer-slotter unit which enables adjustment of the creaser and slotter heads from the printer sideof the unit. Such modification of the earlier type of printer-slotter unit is not feasible, however, and therefore the more economical in-line operation heretofore has not been available to those plants which have the earlier type of equipment, even though suchequipment may readily accommodate use of .the fast-drying inks. g 1
SUMMARY OF THE INVENTION In its basic concept, this invention effectively accommodates the integration of printer-slotter and foldergluer units in spaced-apart relation but capable of inline operation, by providing an articulated conveyor arranged to retractably span .the spacebetween the units.
It is by virtue ofthe foregoing basic concept that the principal objective of this invention is achieved; namely, to overcome the aforementioned disadvantages and limitations of prior paperboard container production equipment.
Another important object of this invention is the provision of an articulated conveyor of the class described which is adaptable for mounting on conventional folder-gluer units for lateral adjustment with the conveyor mechanism of the unit.
Another important object of this invention is the provision of an articulated conveyor of the class described which may be incorporated as an articulated extension of the conveyor mechanism of a conventional foldergluer unit.
The foregoing and other objects and advantages of this invention will appear from the following detailed description, taken in connection with the accompanying drawing of a preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a fragmentary, foreshortened plan view il- DESCRIPTION OF THE PREFERRED EMBODIMENT For the purpose of this description there is shown schematically in the drawing a conventional printerslotter unit 10 which includes a printer component 12 and a slotter component 14. The printer component functions to print advertising and other informative data on container stock blanks, as received from a conventional corrugator unit (not shown), prior to processing through the slotter component. Fast drying inks are employed in the printer component.
The slotter component 14 functions to crease and slot the printed stock longitudinally to provide fold lines and container tabs. For this purpose the slotter unit includes a plurality of creaser and slotter heads 16 mounted on driven rolls 18, in manner well known in the art. The heads are adjustable along the rolls to accommodate the production of containers of'various sizes and types, and such adjustments are made from the outfeed end of the slotter component, as in the early type of unit previously described.
V The drawing also shows a portion of a conventional foldergluer unit 20 which functions to fold'the creased and slotted blank and to glue together the lapping tabs, as is well known. In the drawing, the folder-gluer unit includes a control console 22 and a pair of laterally spaced elongated conveyors 24 mounted for independent lateral adjustment to accommodate container blanks of varying shapes and sizes; j
Each of the conveyors 24 of the folder-gluer unit includes an upper conveyor section and a registering lower conveyor section. In the embodiment illustrated the upperconveyor section comprises an elongated frame 26 mounting a plurality of guide rolls over which are trained an endless conveyorbelt 28. The lower conveyorsection comprises an elongated frame 30 mounting a plurality of longitudinally spaced idler rolls 32 which register with the lower working stretch of the conveyor belt 28 for moving the container stock blanks terough the unit.
In accordance with this invention, the infeed end of" the folder-gluer unit 20 is spaced downstream from the outfeed end of the printer-slotter unit 10 a distance sufticient to provide adequate space between them to allow an operator to gainaccess to the sloter component for the purpose ofadjusting the creasing and slotting heads 16. It is this space that the articulated conveyor of this invention spans retractably.
In the embodiment illustrated, the articulated conveyor of tis invention includes upper and lower sections aligned in cooperative relation with the upper and lower sections of each of the conveyors 24 of the folder-gluer unit. The upper section of the articulated conveyor comprises a frame 34 secured pivotally at its trailing end to the infeed end of the frame 26 of the upper conveyor by means of a pivot shaft 36. The
between the outfeed end of the slotter component 14 and the infeed end of the conveyor 24, and the upwardly retracted position illustrated in broken lines.
Means is provided for pivoting the-frame 34 between the operative and'retracted positions. In the embodiment illustrated, such means comprises an extensible fluid pressure piston'cylinder unit 38, either pneumatic or hydraulic. One end of the unit is connected pivotally to the frame 26 of the upper section of the conveyor 24 of the folder-gluer unit, by means of a pivot shaft 40. The opposite end of the unit is connected pivotally to the frame 34 of the upper section of the articulated conveyor, by means of a shaft 42. Thus, by application of fluid pressure to the cylinder to effect extension of the unit, the frame 34 of the upper section of the articulated conveyor is pivoted to the retracted position, as will be understood.
The lower section of the articulated conveyor comprises an elongated frame 44 which underlies the frame 34 of the upper section and which is connected pivotally at its leading end to the infeed end of the lower frame 30 of the lower section of the conveyor 24 of the folder-gluer unit, by means of a shaft 46. Thus, the lower frame 44 is pivotable between the operative position shown in full lines in FIG. 2', wherein it underlies the upper frame 34 in the operative position of the articulated conveyor, and the upwardly retracted position illustrated in broken lines wherein it is located in registry with the retracted upper conveyor section on the side of the latter facing the outfeed end of the slotter component 14.
The means provided forpivoting the lower frame 44 is an extensible fluid pressure piston-cylinder unit 48, one end of which is connected pivotally to the lower frame 30 of the lower section of the conveyor 24 of the folder-gluer unit, by meansof a shaft 50, and the other end of which is connected pivotally to the lower frame 44 of the articulated conveyor, bymeans of a shaft 52.
In the embodiment illustrated, the frame 34 of the upper section of the articulated conveyor mounts a plurality of guide rolls 54 for the endless conveyor belt 28. In this regard, it will be I understood that the endless conveyor belt of the folder-gluer unit is lengthened to position illustrated in full lines in FIG. 2. One of the idler rolls 56' is carried by the pivot shaft 46 by which the frame 44 is pivoted to the infeed end of the lower frame 30.
By the foregoing construction, in which the articulated conveyor frames and the piston-cylinder units are connected to the corresponding frames of the associated conveyor of the folder-gluer unit, the articulated conveyor is movable laterally with the associated conveyor of the folder-gluer unit.
In the operative position of the articulated conveyor the printed and slotted container stockblanks are received'from the outfeed end of the slotter component nent, the articulated conveyor sections are moved to the retracted positions illustrated in broken lines in FIG. 2, by appropriate operation of the piston-cylinder units 38 and 48. In this position of retraction, sufficient space is made available at the outfeed end of the slotter component to allow the operator to enter therein to make the appropriate adjustments. Accordingly, the articulated conveyor accommodates the integration of a conventional folder-gluer unit and a conventional printer-slotter unit of the early type previously described in which the creaser and slotter heads must be adjusted from the outfeed-end thereof. This integration of the units affords in-line operation for the continuous production of paperboard containers, by the simple expedient of using fast drying ink in the printer component 12.
In the embodiment illustrated, the sections of the articulated conveyor are constructed to be compatible with the construction of the sections of the conveyor of the folder-gluer unit. Thus, in the embodiment illustrated, the upper section of the articulatedconveyor 14 and delivered continuously to the folder-gluer unit. 6
When it becomes necessary to change the settings of the creaser and slotter heads 16 of the slotter compoaccommodates the endless belt construction of the upper section of the folder-gluer unit conveyor and the lower section of the articulated conveyor includes idler rolls matching those of the lower section of the foldergluer unit conveyor. If the folder-gluer conveyor includes endless belts on both upper and lower sections, or driven rolls on both sections, or any other form of conveyor construction, the sections of the articulated conveyor may be constructed to match.
Although the printer-slotter and folder-gluer units illustrated normally are utilized in the production of containers from corrugated paperboard stock, it will be understood that they may be utilized in association with the articulated conveyor of this invention for the production of containers from solid fiber and other forms of paperboard, where desired. i
From the foregoing, it will be appreciated that the articulated conveyor of this invention enables the integration, for in-line operation, for a conventional foldergluer unit and a conventional printer-slotter unit of the early type in which adjustment of the creaser and slotter heads must be made from the outfeed side thereof, simply by utilizing in the printer component the presently available fast drying inks, rather'than the former slow drying inks. Accordingly, the large number of printer-slotter units of the early type may be utilized with minimum modification in the more economical continuous in-line operation.
It will be apparent to those skilled in the art that various changes may be made in the size. shape, type, number and arrangement of parts described hereinbefore, without departing from the spirit of this invention.
Having now described my invention and the manner in which it may be used, I claim:
1. In combination with paperboard container forming apparatus including a printer-slotter unit and a foldergluer unit arranged in spaced apart, longitudinal alignment, the folder-gluer unit having a pair of laterally spaced, longitudinally extending paperboard conveyors each including vertically aligned upper and lower conveyor supports, conveyor means for retractably spanning the space between said units, comprising a. an upper elongated spanner conveyor mounted pivotally at one endon the infeed end of each upper conveyor support of the folder-gluer unit for movement between an operative position extending toward the printer-slotter unit and the retracted position extending upward from the upper conveyor support of the folder-gluer unit,
b. a lower elongated spanner conveyor aligned with the upper spanner conveyor and mounted pivotally at one end on the infeed end of each lower conveyor support of the folder-gluer unit for movement between an operative position extending toward the printer-slotter unit below the upper spanner conveyor and a retracted position extending upward from the lower conveyor supportof the folder-gluer unit on the side of the retracted upper spanner conveyor facing the printer-slotter unit, and
c. power means interengaging the folder-gluer unit and said upper and lower spanner conveyors for pivoting the latter between said operative and retracted positions.
2. The combination of claim 1 wherein the power means comprises an elongated fluid pressure pistoncylinder unit interconnecting the folder-gluer unit and each of said spanner conveyors.
3. The combination of claim 1 wherein the upper conveyor support of the folder-gluer unit supports an upper conveyor belt extending around the associated upper spanner conveyor.
4. The combination of claim 1 wherein the pair of conveyors of the folder-gluer unit are arranged for lateral adjustment, the spanner conveyors being laterally adjustable therewith.
5. The combination of claim 4 wherein the power means comprises an elongated fluid pressure pistoncylinder unit interconnecting each of the upper and lower conveyor supports and the associated spanner conveyor.