US2359440A - Method of producing album bag sections - Google Patents

Description

Oct. 3, 1944.1 w, POFQ E 2 ,359,440

METHOD OF PRODUCING ALBUM BAG SECTIONS Filed May 5, 1942 2 Sheets-Sheet 1 ull Q i* w INVENTOR 1944-; G.W.POPPE 2,359,440

METHOD OF PRODUCING ALBUM BAG SECTIONS Filed May 5, 1942 v z sheets-sheet 2' i g; \INVENTOR I v POPPE ATTORNEY Patented Oct. 3, 1944 METHOD 'OF PRODUCING ALBUM BAG SECTIONS George W. Poppe, Brooklyn, N. Y., assignor to Equitable Paper Bag Co. Inc., Long Island City, N. Y., a corporation of New York Application May 5, 1942, Serial No. 441,812

4 Claims.

The present invention relates to a method of and a machine for producing an album bag section. That is to say, a section which when the bottom flap is folded over and pasted, an album bag having a binding edge is produced.

The binding edge may be formed of two or more plies depending upon circumstances and the purpose for which the bag is ultimately to be used. If the bag is to be used for the storage of phonograph records for instance, it may be desirable that the binding edge contain several plies.

An object of the present invention is to pro.-

vide a method of cutting and folding a web of paper which is continuously advancing whereby after the web is folded to form a tube, bag sections may be out off by the former and lip knife of a bag machine and at high speed.

Another object is to facilitate the cutting off of bag sections.

A feature of the invention relates to the manner of cutting the web transversely prior to folding it into a tube.

Another feature relates to theform of the lip knife of a bag machine and its manner of cooperation with a tube so cut that severence by the lip knife is comparatively easy.

A further feature is the production of a bag tube section on a bag machine in which the top and bottom of the marginal binding edge is die cut at one or more of its plies.

Further features and advantages will become apparent from the following detailed description and claims when taken in connection with the accompanying drawings in which:

Fig. 1 is a more or less diagrammatiotcp-view of a portion of abag machine showing the manner of cutting and folding a continuously advancing web of paper;

Fig. 2 is a section somewhat enlarged, on the line 2-2 of Fig. 1;

Fig. 3 is a plan view of the former somewhat enlarged, with parts broken away, showing the relation of the under wall of thefolded web to the former;

Fig. 4 is a fragmentary section of the webshowing one manner of cutting the same prior to folding;

Fig. 5 is a view somewhat similar to Fig. l but in which the web is cut transversely only on one edge thereof. This figure alsoshows the type of lip knife used when the web is cut as in this figure;

Fig. 6 is a perspective view on an enlarged scale of the lip knife used in practicing the method shown in Fig. 5;

Fig. 7 is a perspective view of a bag tube section after it has been out off in accordance with the method disclosed in Fig. 5;

Fig. 8 is a fragmentary view of a web in which both side edges have been folded over and pasted prior to any cutting of the web, and,

Fig. 9 is a fragmentary view showing a portion of the web which has transverse cuts only at one edge thereof as distinguished from the type of web shown in Fig. 4. In producing a bag tube section such asshown in Fig. '7 the binding edge I may contain two or more plies. Three plies are shown in Fig. 7 although it is obvious that if the under wall were not folded over as at 2, said binding edge would contain only two plies. The section includes a flap 3 which is a prolongation of the under wall and in the completed bag, this flap is folded over and pasted to the upper wall 4. This flap, however terminates at the inner portion of the binding edge I and therefore when the flap 3 is folded over onto the wall 4 the binding edge is not included in the fold.

In order that bag sections of the general type shown in Fig. 7 may be produced commercially at high speed the present invention provides a method of cutting the web prior to folding the same into the form of a tube. Such bag tube sections of the general type shown in Fig. 7 may be produced by cutting off successive portions of a folded web by the former and the lip knife of an ordinary bag machine, although in carrying out the method according to the present invention both the former and the lip knife are or may be modified, as will hereinafter appear.

The type of bag machine with which the present invention is concerned as illustrated in my prior Patent 1,798,168, March 31, 1931. In said machine a web of paper is fed into the machine and dies produce longitudinal cuts as shown at Ill] Fig. 9 or substantially longitudinal cut such as shown at I30, Fig. 11. The web is then folded into a tube and severed into bag tube sections by the former and lip knife shown in Fig. 1 of said patent.

In illustrating the manner of practicing the method herein disclosed a number of details of the bag machine have been omitted and reference is made to said patent for a more detailed showing of such details.

Referring to Fig. 1 the Web, passing from the usual roll, is fed over a roller 6, which roller corresponds to the roller 35 in my aforesaid patent. As the web passes over this roller, it received a paste line 8 spaced inwardly a short distance from its marginal edge and a second paste line It! spaced close to the other marginal edge. These paste lines are applied by paste discs II dipping into paste pots I2. A shaft l3 situated vertically above the roller 6 contains a scoring device M which scores the web along a line I5.

As the Web passes over another roller IE it receives cuts which are substantially longitudinal and other cuts which are substantially transverse by dies mounted on a shaft I8 situated vertically above the roller IS. The die I9 makes a substantially longitudinal cut in the web and this die may be similar to one of the dies 60 shown at Fig. 2 in my aforesaid patent. The die 20 makes a substantially transverse cut in the web at one edge thereof and the die 2| makes a substantially longitudinal out similar to that made by the die l9 and also a substantially transverse cut which extends to the edge of the web on the side opposite to that made by the die 29. The die 2| may, if desired be made in two parts, one part making the longitudinal cut and the other making the transverse cut. In the figures, however, the die 2| is shown as making both the longitudinal and transverse cuts. The cuts made by the die 20 are indicated at 22. The cuts made by the die 19 are indicated at 23 and the longitudinal cuts and transverse cuts made by the die 2| are indicated by 24 and 25 respectively.

The longitudinal cuts 23 and 24 ma be strictly longitudinal, that is to say, parallel with the longitudinal axis of the web, or they may be slightly diagonal as shown. The slightly diagonal cuts are preferable because they result in a trapezoidal form of flap 3 in Fig. 7. Therefore, in the further description and in the claims, the expression longitudinal cuts will apply to the cuts 23 and 24 and the expression transverse cuts is applied to the cuts 22 and 25.

The cuts 25 form an inverted V, the apex being rather obtuse and coinciding with the score l5.

It will be noted that the cuts 22 are not strictly perpendicular to the axis of the web, but at a slight angle. This angularity is for the purpose of getting a better out than would be had if the die making the out were perpendicular to the axis of the web. In other words, there is a slight shearing action when the die is formed as shown. The same is true of the cuts 25.

A die 26 mounted on shaft 21 situated vertically above a roller 28 makes cuts 29 in the web, which cuts are generally known as thumb cuts and serve the purpose of enabling the bag to be opened more readily.

The web is drawn through the machine by the usual feed rollers of which the upper pair 39 and 3] are shown in Fig. 1. The web passes under the former 33 and is folded over onto the former before reaching the feed rollers. A fold line is indicated by aa Fig. 1 and coincides with one end of each of the cuts 23.

In practicing the method illustrated in Fig. 1

one edge of the web is turned up along the score line l and turned over on its self and pasted to the web. The turning up and turning over of the web is brought about by a plow share 34.

After the edge is turned up and over, the V portions of the cuts 25 coincide as indicated in Fig. 1.

The former 33 is of the usual bag tube width for a portion thereof extending forwardly from the heel 35, but is provided with a shoulder 35 and from the shoulder to the serrated end 38, the former is narrower than the tube width. The position of the plow share 34 is such that as the edge of the web 31 is turned up and over, the completion of the turning over is not effected until the web has passed the shoulder 33 and therefore the edge 31 is pasted to the web just after the paste line 8 passes the shoulder 36.

The web is folded over on top of the former along the score aa and the edge 46 is pasted to the turned over edge 31. The cuts 22 then coincide with the cuts 25. The tube thus form passes to the feed rollers.

In order that the past line 8 may not smear paste on the former as the web passes underneath the former, the latter contains a groove 40 shown in Fig. 2a.

After the tube passes the feed rollers, it is cut off into bag sections by the serrated edge 38 of the former and by the serrated edge of the lip knife 42. The cutting off is brought about as usual through the operation of a striker bar 44 carried by a sprocket chain 45 operated in the usual manner and. shown more in detail in my aforesaid patent. The usual pinch bar mechanism is not shown herein but is of well known construction and is shown in said patent.

The cuts 22 and 25 are each of such length that they extend from the folded over edges of the web to a distance equal to the width of the binding edge. Therefore, none of the plies constituting the binding edge are required to be severed either by the former or the lip knife. This is true of the method as illustrated in Fig. 1 because the web has been previously cut as at 22 and 25.

With the method therefore as described in the Fig. 1 construction, the former is required to sever only one thickness of paper constituting the lower wall of the tube and the lip knife is required to sever only one thickness of paper constituting the upper wall of the tube. As a result of die cutting at the left of the web as indicated at 22, Fig. 1, and at 24 and 25 at the right edge of the web, the binding edge presents a smooth appearance at its upper and lower edges. This method in thus relieving the lip knife of the burden of cutting the binding edge differs from the method disclosed in my application, Serial No. 440,812, filed April 28, 1942, for Method of making album bags, in relieving the lip knife of extra burden and therefore tending to diminish the vibration of the lip knife at the time of severing the bag tube into sections.

The construction of the former head is shown in enlarged detail in Fig. 3 and it is to be understood that the timing of the parts is such that the striker bar cuts off the lower wall by the serrated 38 of the former at the time that the cuts 23 and 24 arrive at the position shown in Fig. 3. The lip knife cuts the upper wall at substantially the same time.

Fig. 4 illustrates diagrammatically how the method may be carried out when the web is not pasted at either of its edges. It is folded over, however along the line aa. as in Fig. 1 and in its folded over condition the cuts 22 coincide with the cuts 25 and the same type of former and lip knife are used as in the Fig. 1 form.

Fig. 5 is somewhat similar to Fig. 1 but in practicing the method as there illustrated, the cuts 22 are not made at one edge of the web, but otherwise the cuts are similar to those shown in Fig. 1. The web is scored along the line [5 by the score disc I4 and the edge 31 is turned over and pasted to the web as described in connection with Fig. 1. The upper wall, in the folded over condition of the web, is not cut at the binding edge and therefore the lip knife takes the form shown in Fig. 6. The serrated edge 48 of the lip knife is straight to the point 49 but from 49 to 50 the lip knife is provided with a serrated edge and this edge is at a slight angle corresponding to that of the cuts 25. In this construction therefore, the former severs the lower wall of the folded over web along a line coincident with the outer ends of the cuts 23 and 24 and the lip knife severs the upper wall of the folded-over web from the binding edge to the line of fold a.--a.

By outer ends of the cuts 23 and 24 is meant the more advanced ends as the folded over web progresses in the direction of the arrows shown in Figs. 1 and 5. The trailing ends of these cuts are referred to as inner ends and since the lip knife is set back from the former the lip knife will sever the upper wall of the folded-over web along a line which is coincident with the inner ends of the cuts 23 and 24, to the point 49, Fig. 6.

In the Fig. 8 form, the web is pre-folded at both of its edges, the width of the folds being substantially equal to the width of the binding edge, the web being thus prefolded before it, passes over the roller 6. The cuts are then made as in Fig. 5.

If a line of paste is supplied as at 46 Fig. 5, to the web shown in Fig. 8, then the two binding margins are pasted together before the tube is finally cut into bag sections. The cutting is the same as described in connection with Fig. and is the same whether the binding edges in the folded-over condition of the web are pasted together or whether they are left unpasted.

In the practice of the method as illustrated in Fig. 9 the web is out in the same manner as in Fig. 8, but in this case the edges of the web have not been prefolded. When the web is folded over, its opposite edges may be pasted together or they may be left unpasted as described in connection with Fig. 8. In the latter case the binding edge will contain, of course, only two plies.

In Fig. 1 additional transverse cuts such as 22 are also made and the same is true of the form shown in Fig. 4.

In Fig. 5 the cuts 22 are omitted and they are also omitted in the Fig. 8 construction.

It will be observed from Fig. 7 that the marginal binding edge I appears on the right side of the bag section there shown, but in binding the several sections into album form each bag, with the bottom flap 3 folded over and sealed, is turned over so that the binding edge I is at the left, as is usual in binding books, etc. Therefore, as the abum is opened, the turned over flap 3 is not visible. Also it is to be noted that the two plies formed by folding over the edge 31 are die out. These die cut edges appear on both the top and the bottom of a bag as bound, the bottom end only being visible in Fig. '7.

If the method is practiced according to the forms illustrated in Figs. 1 and 4, then both ends of the bag at the marginal binding edge are die cut and this tends to produce a bag of good appearance.

By reason of the transverse cuts, whether on one side of the web or on both sides, results in a folded over Web or tube which requires only one thickness of paper to be cut by the lip knife and this has the advantage of preventing undue strain on the lip knife and any undue vibration, at the time of severance.

Variations may be resorted to within the scope of th invention and some of the features may be used without others, all within the scope of the appended claims.

What I claim is:

1. Those steps in the making of a bag tube section for an album bag having a binding edge which include making pairs of transversely spaced substantially longitudinal cuts and pairs of transversely spaced substantially transverse cuts in a continuously advancing web of paper,

each of said pairs of cuts being spaced apart longitudinally at bag section intervals, each of a pair of substantially transverse cuts extending inwardly from the each side edge of the web, the pairs of substantially longitudinal cuts being Within the web margins, one of each pair of said transverse cuts meeting one end of one of said pairs of substantially longitudinal cuts, and folding said web along a line coincident with at least one end of the longitudinal cuts constituting a longitudinal series of cuts, the substantially transverse cuts at one edge of the web coinciding with the substantially transverse cuts at the other edge of the web in the folded over condition of the web, whereby the binding edge is provided with spaced cuts.

2. Those steps in the making of a bag tube section for an album bag which include making pairs of transversely spaced substantially longitudinal cuts in a continuously advancing web of paper and within the margins thereof, the pairs of cuts being spaced apart longitudinally at bag section intervals, the cuts constituting two series each longitudinally arranged, making substantially transverse cuts in at least one edge of the web which are also spaced apart at bag section intervals, each of said latter cuts meeting one end only of one series of longitudinal cuts and folding over one edge of the web having the substantially transverse cuts therein along a line which bisects each of said cuts.

3. Those steps in the making of a bag tube section for an album bag which include making pairs of transversely spaced substantially longitudinal cuts in a continuously advancing Web of paper and within the margins thereof, the pairs of cuts being spaced apart longitudinally at bag section intervals, the cuts constituting two series each longitudinally arranged, making substantially transverse cuts in at least one edge of the web which are also spaced apart at bag section intervals, each of said latter cuts meeting one end only of one series of longitudinal cuts, folding over one edge of the web having said substantially transverse cuts therein along a linewhich bisects each of said cuts, and folding over the other edge of the web along a line which is coincident with at least one end of each of the other series of longitudinal cuts.

4. Those steps in the making of a bag tube section for an album bag having a binding edge which include making pairs of transversely spaced substantially longitudinal cuts and pairs of transversely spaced substantially transverse cuts in a continuously advancing web of paper, each of said pairs of cuts being spaced apart longitudinally at bag section intervals, each of a pair of longitudinal cuts extending inwardly from each side edge of the web, the pairs of substantially longitudinal cuts being within the web margins, one of each pair of .said substantially transverse cuts meeting one end of one of said pairs of substantially longitudinal cuts, folding over one edge of the web having substantially transverse cuts along a line which bisects each of said cuts and folding over the other edge of the web along a line which is coincident with at least one end of each of the other series of substantially longitudinal cuts, the substantially transverse cuts at the unfolded over edge of the web coinciding with the substantially transverse cuts at the folded over edge of the web in the folded over condition of the web whereby the binding edge is provided with spaced cuts.

GEORGE W. POPPE.

CERTIFICATE OF CORRECTION. Patent No. 2,559,1 h0. October 5, 19th,

GEORGE w. POPPE.

It is hereby certified that error appears in the printed specification of the above nunioered patent requiring correction as follows: Page 1, first column, line 1 1, after "Fig. 1;" insert the following paragraph -Fig. 2a is a fragmentary sectional view taken along line 2a-2a in Fig. l;-;

page 2, second column, line 5, for 'past" read -paste--; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 5th day of December, A. D. 19%.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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