DE3425608A1 - METHOD FOR PRODUCING MULTI-LAYER PAPER BAGS WITH STRAIGHTED CAP - Google Patents

Description

-ν rFNTANWÄLTE GmDde ^ bau ^ er strass.

O / O C Cn O D-4800 BIELEFELD 1

JiPL-ING. BODO THIELKING 34 2obUö

DlPL, ING. OTTO ELBERTZHAGEN

POST CHECK ACCOUNT: HAN 3O91 9; 3C «LEGAL FILES. "\ 3 5S 1 DATE: July 9, 1984

Applicant: Icoma Packtechnik GmbH, Fautenbacher Straße 26, 7590 Achern

Process for the production of multilayer paper sacks with a staggered closure flap

The invention relates to a method for producing paper sacks, in particular multi-layer gusseted sacks with a staggered closure flap.

Paper bags with staggered flaps are manufactured on relatively expensive machines. There are perforation and tear-off devices required for each individual layer of paper. The relatively high mechanical engineering effort is nevertheless made, because paper sacks with a graduated cut are technically advantageous, especially because of the low material consumption.

In contrast, the technical facilities for producing paper sacks with a smooth cut edge are much cheaper. However, the straight cut has various technical disadvantages, in particular it requires a significantly higher material consumption, Two folds are always required for straight-cut bags. Paper sacks with straight cut can be produced in most paper sack factories, since straight cut equipment is usually used there available.

The invention is based on the object of a method for manufacturing of paper sacks with a staggered closure flap

2 -

j 13 581 July 9, 1984

! to create in which a straight-edge cutting machine can be used,
\ the material consumption is reduced and the production of a
^; Paper sacks with only one fold is possible.

The solution is achieved according to the invention in that the paper tube cut off smoothly, at least along the outer layer
the longitudinal outer fold edges by an amount
slotted, then at least the outer layer across the

! Bids back the lengthways direction of the sack and ultimately the not

: bent back paper layers are cut back.

; j

! i

■ It has proven to be useful that the ^{paper layers not bent back 1} I cut back to the end of the slot [

will.

j;

i According to the invention it is also proposed that the return:

ι cut by means of engaging from different sides;

; bringable knife takes place. ·

! I.

I I

i The method according to the invention allows the production of a j

i paper sacks with staggered flap under j

• Use of straight edge cutting machines. Inexpensive i

ji ¹ additional equipment to get out of the clean cut sack

I to make a paper sack with a staggered flap, ■

I a paper sack that has all the advantages of a easel sack j

ι, which is otherwise only available with a much larger machine!

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ι technical effort can be generated. j

I!

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■ Hereinafter, preferred embodiments of the invention \ be described with reference to the drawing. It show: i

Figure 1 - a perspective view of one end of a! 'Paper tube, according to the invention

Method was produced, ι

■ Figure 2 - a longitudinal section through the one shown in Figure 1!

i 13 581 July 9, 1984

* ■

Paper sack end in the flat state,

Figure 3 - the final configuration of the lay-flat paper sack in a first embodiment with a fold, j Figure 4 - the final configuration of the paper sack with two foldings, ! FIG. 5 - a longitudinal section through the smoothly cut end of a paper sack laid flat with the side

slotted fold edges,

Figure 6 - the end of the laid-flat paper sack with a | flap area folded up, i

Figure 7 - a schematic representation of the trimming J the not bent back paper layers. ι

! The paper sack has an outer layer 1 or 1a. The external |

position 1 is comparable with the inner layer 2 through a Querklebung 3 · ■

bound. The d = r first outer layer 1 opposite outer '

layer 1a is also with the underlying inner layer 2a, Connected via a transverse adhesive 3. At 8 the two are

inner gussets, while with 9 and 9a the j

outer gussets are designated. Along the outer I. Gussets 9 are the layers of paper that are glued together

1 and 2 provided with the longitudinal section 7. i

The final configuration of the paper sack shown in FIG. 1 can be seen in FIG. 2 in the flat state. The front edge 4 of the transversely glued together paper layers 1 and 2 lies by an amount a in front of the front edge 5 of the one another Paper layers 1a and 2a connected via a transverse adhesive 3.

In the embodiment according to FIG. 3, all paper layers are folded over around the transverse fold line 10. In the end area, on the one hand, the outer sides of the paper layers 1a lie on top of one another and are glued to one another via the adhesive point 6. The paper layer 2 glued transversely to the first outer layer 1 overlaps the splice 6 and the inner paper layer 2, which is glued transversely to the first outer layer 1, in turn rests on the outside of the paper layer 1a and is with this paper layer

I 13 581 July 9, 1984

: connected via the adhesive point 6a.

ι,

i '

i Figure 4 shows a further development of the embodiment according to Figure 3, '·

in which the second outer layer 1a is also connected to the:

i j j bound inner layer 2a is folded over twice. The exterior

! lying, simply folded ends of the paper layers 1, 2 are j i!

: glued to the second outer layer 1a via the adhesive point 6a.

j The inner ends of the paper layers 1a, 2a are in front of the ',

j second fold outwards with the ends of the paper layers I.

J1,2 over a first glue point 6 and behind the second '

! Fold inwards with the second outer layer 1a over a j

j I

j second glue point 6 connected. ;

; The sequence of cutting back is shown in FIGS. 5 to 6. The paper layers 1 and 2 are slotted into the area of the ι I counter holder 11. They are supported by the paper layers 2a \

■ and 1a bent away to the position shown in Figure 6. This; ! can be done by means of a suction belt, guide rod or other elements, i i After folding back, using the cutting knife 12,

and counter knife 13 existing cutting device in j ! FIG. 7 dash-dotted areas of the paper layers 1a and 2a;

■ cut off. ;

Claims (3)

ρ / \ - ΓρκΐΤΔΝ \ Λ / ΔΙ TF gadderbaumer strasse 20 Γ- / Λ IUM / AINVV / AI_I C: O / OCrnO D-48OO BIELEFELD 1 DIPL.- ING. BODO THIELKING J 4 Z 0 D U O TELEPHONE: (O5 21) 6 06 21 + 6 3313 DIPL.- ING. OTTO ELBERTZHAGEN _{TELEX: 932059 anwltd} POST CHECK ACCOUNT: HAN 3O91 93-302 LAWYERS FILES: 13 581 Date: July 9, 1984 Patent claims: Process for the production of paper sacks, in particular multi-ply Gusseted bags with a staggered closure flap , characterized, that the paper tube is cut off smoothly, at least the outer layers (1st and possibly 2) along the lengthways outer fold edges (9) slotted, then at least the outer layer (1 and possibly 2) bent back transversely to the longitudinal direction of the bag and the paper layers not bent back (1a; 2a) be cut back. 2. The method according to claim 1,
characterized, that the not bent back paper layers (1a; 2a) are cut back to the end of the slot (7). 3. The method according to claim 1 or 2,
characterized, that the cutting back by means of different sides the paper tube engageable knife (.12 and 13) he follows.