US1920809A

US1920809A - Method of producing box or container parts having alpha curved bottom

Info

Publication number: US1920809A
Application number: US429250A
Authority: US
Inventors: Schmiedel Johannes
Original assignee: FIRM UNIVERSELLE CIGARETTENMAS
Current assignee: FIRM UNIVERSELLE CIGARETTENMAS; Firm Universelle Cigarettenmaschinen-Fabrik J C Muller & Co
Priority date: 1929-02-26
Filing date: 1930-02-18
Publication date: 1933-08-01
Anticipated expiration: 1950-08-01

Description

Aug. 1, 1933. J. SCHMIEDEL METHOD OF PRODUCING BOX OR CONTAINER PARTS HAVING A CURVED BOTTOM Fild Feb. 18, 1950 s sheets-sheet 1 Fig.2

Fig.8

Fig.

J. SCHMIEDEL Aug. 1, 1933.

. METHOD OF PRODUCING BOX OR CONTAINER PARTS HAVING- A GURVED BOTTOM Filed Feb. 18. 1930 3 Sheets-Sheet 3 Patented Aug. ll. @33

.lfohannes Schmiedel, Dresden, Ge is =1: ignor to the Firm lilniverseile Gigaretteaschinenand in Germany February 26, 1929 8 Claims.

This invention relates to improvements in the production of the parts of boxes or containers having a curved bottom.

In the production of boxes and particularly those which are provided with lids and with a neck insert it is usual to give the lid a convex curvature and also to provide it with impressions.

It has been proposed to form boxes first with a fiat bottom and a flat lid, to open them after they are completed and in this condition to deliver them to a stamping press which produces the curvature of the bottom of the lid and the necessary impressions. This known method has the disadvantage that it involves changing the shape of the already completed box, an operation which with fragile articles does not produce a satisfactory product.

It has moreover been proposed to curve the blank as regards its bottom portion before production of the box and to apply the blank thus shaped to the completed under part and form it on this. This operation involves great dificulty because the shaping of the lid portion on the neck insert is naturally possible only when the lid portion is of fragile paper and the neck insert of strong cardboard.

As distinguished therefrom the present method consists in shaping a box blank already curved as regards its bottom portion in a shaping chan nel with'the aid of a forming block adapted to be applied to the one side flap and having a shape corresponding to the curvature. In this way separate box or container parts or even complete boxes can be produced with and without neck. inserts in one operation and the curvature of the portion of the bottom of the box in question produced in a satisfactory manner.

In apparatus intended for carrying the method into efiect a pile of blanks is provided from which the blanks are delivered separately into a press for curving the bottom whereupon the blanks withthe bottom now curved are placed in front of a shaping channel or in frontof the forming block, the side ofthe shaping channel corresponding to the curved side of the forming block being mounted resiliently.

The invention is illustrated in the accompanying. dra.wings in which I Fig. 1 is a vertical longitudinal section through the apparatus, a

Figs. 2 and 3 show the shaping press in open condition in longitudinal and in cross section respectively, I

Fig. 4 shows the rectangular shaping channel 5 in section on the line 1-4 or Fig. 1,

' blade spring 10 against the abutment 11 is pushed- Fig. 5 is a vertical cross wction on the line 5-5 of Fig. l,

Fig. 6 is a plan view of Fig. i, the upper por tion of the shaping press and the i0 lmzazi. block guide being omitted, go Fig. '2 shows the blank with its ped bottom part.

Fig. 8 shows in perspective the formal employed. v

Fig. 9 is a sectional elevation showing the role as tive position of the driving means about the subject matter of Fig. 1 of the drawings.

Fig. 10 is a detail longitudinal section showing the shaping press in open condition and'inclliel= ing the blank feeding lug.

Fig. 11 is a section along line 11-41 of 123.

Fig. 12 is a sectional elevation siniilar to Fig. 4 showing in addition thereto actuating means for elements thereof.

Fig. 13 is a top plan view of the device shown in Fig. 9. v

Fig. id is a view similar to Fig. 3 showing added details of the actuating mechanism for elements thereof.

Fig. 15 is a perspective view of the completed box.

Fig. 16 is a lateral sectional pleted box.

Referring-to the drawings, the blanks Z0 are fed from the pile 1 to the shaping station W by means of a lug 2' on the plunger 2. e shaping means consists of a matrix 3 and a hollow die 4 which after the blank is in position on the matrix presses on the side flaps oi the blank. The shaping die 5 which is movable in the hollow die 4, now moves downwards and forms the lid portion with a curved surface as shown in Fig. 7. The lugs 6 provided on the plunger 2 now push the blank along the supporting bars 7 so that the front flap comes into position over the shaping'channel 8. At the same time the blank Zu intended to form the lower'part is view of the com -moved towards the blank forming the lid m tion by means of the plunger 9 so that the two blanksmeet midway over the shapin channel 8.- After the neck strip Za is placed above the lunction of these blanks, the forming block F which is formed with a suitably'curved surface and V which mus inoperative position is pressed by a downwards by means of the plunger 12. The forming block first contacts with the neck strip and presses it against the end flaps 01' theblanks located over the shaping channel, the resiliently supported counter-plunger 13 i'orming anabut:

ment. 01. further downward movement of the plunger 12 the plunger 13 is correspondingly moved backwards and the blanks are given a U-shape. In order to ensure that the lid portion will fit properly around the curved lid forming block the left hand channel wall 14 is arranged to pivot at 15. A spring 16 bearing against the wall 14 presses the latter into the position shown in Fig. 1, the hook shaped lug 14' on the wall 14 bearing against a pin 17. On passage of the box part through the channel the plate 14 is pressed backwards. On the passage of the forming block with the work through the shaping channel 8 the four opposite side flaps are pressed at the same time by the folding cam members 8', 8 against the forming block. After the form ing block has moved with the work into the position shown in dotted lines in Fig. 4 a plunger 18 moves forward and pushes it into the channel 19 where in known manner the still projecting ends of the neck portion are folded by means-of a suitably actuated projection 20 and by a folding finger 21 projecting into the shaping channel. The two upper side flaps' strike against bending bars 22 which bend these side flaps against the forming block. The work passes from the channel 19 the bottom of which is formed by a resilient plate 19' to a device which in known manner provides it with a binding strip.

It should be noted that the one wall 19" of the channel 19 is shaped to correspond to the curvature of the lid portion. It should also be noted that the plunger 2 as shown in Fig. 6 is provided at its forward forked end with two lugs 6 which, at the time when the lugs 2' feed a new blank from the pile 1 to the shaping station W push the blank provided with its curved surface 1 forward on the supporting bars '7.

Actuation of the various movable elements-of the device may be effected as follows:

The lug 2' which feeds the blanks Z0 from the pile 1 is actuated as follows:-

A link 23 is pivotally joined to arm 2 of said lug and one end of a lever 24. The latter is pivoted to the.machine frame 9 at 25. The other end of lever 24 has a roller 26 which tracks a cam 27 keyed to a shaft 34 which is driven in a manner to be presently described.

Lug 9 which feeds the blanks Zu from the pile 1' is actuated as follows:

A link 31 is pivotally connected to lug 9 and to one'end of a lever which latter is pivoted to the machine frame at 32. A link 28 is pivotally connected to lever 30 at 29 and to arm 24 at 24'. In this manner motion of both lugs is accomplished by a single cam. It is, of course, understood that lugs 2 and 9 are guided horizontally in suitable manner.

1 Matrix die 3 is reciprocated vertically as folows:--

The matrix has a roller 36 mounted on an ex tension which tracks a cam 46 keyed to a shaft 41.

Die 5 is actuated as'follo'wsz- The upper end of said die has two

rollers

43 and 44 pivoted thereto in spaced relationship and between the said rollers a cam-42 is borne on a shaft 45 to which it is keyed.

Cams 42, and -46 are driven by means of a sprocket chain 86" which passes oversprocket wheels 3'7, 38"and 35 keyed respectively to shafts 41,45and34.

guide 48 on an extension of the machine frame is actuated as follows:

A lever 50 pivotally engages projection 12' on plunger 12 by means of a forked end 50'. Said lever is pivoted to the machine extension at 49. A link 51 is pivotally connected to lever 50 intermediate its ends and also pivotally connected to a lever 53. The latter is pivoted at 52 to the machine frame. Intermediate its ends said lever 53 has a roller 54 which tracks a cam 55 keyed on shaft 34.

Plunger 13 which is slidably borne in guides 61 having a spring 62 between guide 61 and its head, to retain it in raised position, and a lateral projection 13 at the lower end of the lower guide 61 to prevent it from being moved completely out of guides 61, is actuated as follows:-

A lever is pivotally mounted at 59 to the machine frame. One end 60' of said lever engages the projection 13. The other end of said lever is provided with a roller 60 which tracks a cam 58 keyed on a shaft 5'7.

Suitable gearing 56 connects

shafts

57 and 35 and either of the two may be driven from a source not shown.

Plunger 18 which is slidably borne in the machine frame is actuated as follows:-

A link is pivotally connected to said plunger and to one end of a lever '78. The latter is pivoted intermediate its ends at '79 to the machine frame. The free end of said lever has a cam roller 81 which tracks a cam groove '77 in a cam 7'7 keyed to shaft 57.

Finger 20 which is slidably borne on plunger 18 is actuated as follows:-

A link 72 pivotally engages said finger and one end of a lever '73. The latter is pivotally mounted to the machine frame at '74. The free end of said lever has a roller '75 which tracks a cam groove '76 in a cam '76 keyed to said shaft 5'7.

I claim:

1. A method of producing box or container parts having a curved face consisting in folding a box blank already curved as regards a portion thereof about a forming block having a wall whose shape corresponds to the curved portion of said blank.

2. Apparatus for producing box or container parts having a curved face from box blanks'comprising a shaping press to 'curve a portion of each of said blanks, means for feeding said blanks separately from a pile of blanks into said shaping press, a shaping channel, a forming block having a curved wall,-means for feeding said curved blanks from said press in front of said shaping channel, said shaping channel formed with a curved wall corresponding to the curvature of said forming block wall and being resiliently mounted, and means for moving said curved blank and block through said channel to fold the blank about said block.

3. Apparatus for producing box or container parts having a curved face from box blanks comprising a shaping pressto curve a portion of each of said blanks, means for, feeding said blanks separately from a pile of blanks into the shaping press, a shaping channel, a forming block having a curved wall; means -for feeding said curved blanks from said press infront of said shaping channel, said shaping channel'formed-wlth a curved wall corresponding to-the curvature of the forming block and being resiliently mounted; means for moving said curved blank and said The plunger 12 which is slidably borne in a block through said channel to fold the blank about three edges of said block and the curved face, a second channel formed with a wall recessed to correspond to the curvature of the bot-v tom, and means for moving said block and partially folded blank through said second channel to complete the folding of said blank about said block.

4. A methodof producing a box part having a curved face from a blank, including the step of curving a portion of said blank and then folding said blank about a forming block having a curved wall to conform with that of said blank, said curved portion being folded onto said curved wall.

5. A method of producing a box having a curved face from two box blanks, comprising curving a portion of one of said blanks and then simultaneously folding both blanks about a forming block having a curved wall to conform with that of said previously curved blank, said curved portion being molded onto said curved wall.

, 6. Apparatus for producing a box part having a curved wall from a box blank comprising a shaping press for curvinga portion of said blank, meanswfor feeding blanks separately from a pile to said press, a shaping channel, means for feeding said curved blanks from said press to a posito curve a portion of said blank including a sloping channel and means to fold said curved blank into box shape.

8. Apparatus for producing a box part having a curved wall from a box blank comprising means to curve a portion of said blank, a forming block having a curved wall to correspond to the curve imparted to said blank and means to fold said blank about said block into box shape, said curved portion of-saidblank being adapted to coincide with the curved wall of said block.

JOHANNES SCHMJEDEL.