US1981038A - Gluer - Google Patents

Description

NOV. 20, 1934. 055 1,981,038

GLUER Filed 001. 21, 1931 2 Sheets-Sheet 1 LI V4 1 l l 1 l HAR DLEI J. GU55.

INVENTOR.

ATTORNEY;

H. J. GOSS GLUER Nov. 20, 1934.

Filed Oct. 21, 1931 2 She'etS-Sheet HAROLD J. 6088.

INVENTOR.

A TTORNEYK.

Patented Nov. 20,

- UNITED STATES "PATENT OFFICE wen Harold J. GossQNashna, N. 11., assignor to The International Paper Box Machin e company,

Nashua, N. 11., a corporation of Maine Application October 21, 1931, Serial No. 570,116

struction, especially for the purpose of maintain ing a uniform quantity of glue and also to prevent throwing oil the adhesive at high speeds and also to prevent stringing of the adhesive.

Another feature is scraping means of acertain peripheral dimension with relation to the openings of said pockets.

Another feature is a spiral groove provided on the end of the glue wheel to provide lubrication and to prevent wear between the wheel and the side scrapers.

Other features will be pointed out below.

My gluer represents an advance in the art of spot gluing and especially in the use of spot top gluing which has always presented difliculties. Spot gluing of restricted areas of individual blanks has always formerly been done by transfer segments. The glue builds up on the edges of these segments and consequently it is impossible to accurately determinethe quantity of glue that is going to be applied by the segment, this being especially true if there is a slap in the feed of the blanks or a change in speed. Further, as the segment breaks away from theglue supply wheel there is objectionable stringing of the glue. At high speeds theglue actually throws away and gathers onto the machine parts where it can drip down and seriously gum up the mechanism. The transfer type of glue pot is especially objectionable on cellophane applying machines because on these machines the glue control governs the production. In other words a very little gluewrongly placed will cause the cellophane to transfer from the blank to the applying mecha-- nisms.

Glue pots have been made using wheels with recesses in them such as that disclosed in U. 8. Letters Patent No. 1,793,082 dated February 1'1, 1931. However thistype of pot is a bottom glue pot and consequently the pockets are drilled large and shallow as they simply carry around a supply of glue. Neither was it necessary to scrape the remainder of the wheel dry for the purposes to which this pot was put was simply to make the supply of glue in some sections much heavier than the remainder. 7

With a top glue pot, that is, one in which the glue is applied on top of a blank I have discovered that the holes or pockets. should be very small and very deep compared to their diameter. This type of hole brought astonishing results. The glue was forced up into the holes but never forced the air out of the pockets completely. 7 Thus by using a scraper peripherally longer than M the open end of the hole the glue could be compressed into the hole and immediately after passing the scraper it was forced to protrude again by the compressed air in the shape of a pimple or button. The compression being constant the protrusion is constant and gravity or centrifugal force cannot cause the glue to throw off because of the greater pull of vacuum after the pimple or button is formed. 4

Thus speed has no effect on this glue pot and neither is there any opportunity for the glue to build up to any surplus whether the glue is being used up by blanks or not. A scraper whose active edge is peripherally larger than said open end is essential as otherwise the air pressure built I up as the glue is compressed into the holes causes the glue to shoot around or by-pass the scraper and build up onto the under side of the scraper. My single wheel top glue pot permits the glue pot to-be completely covered to prevent the evaporation of solvent which is used in some glue especially the moisture proof cellophane glues. In the drawings Figure 1 is a plan of a gluer embodying. my invention;

Figure 2 is an elevation thereof; Figure 3'is an elevation in perspective of a portion of the mechanism;

Figure 4 is an elevation of the scraper and a partial elevation of the glue wheel, on a larger scale; and

Figure 5 is a plan of a blank that has been operated on by the wheel shown in Figures 1' to 4.

Glue wheel or roll 1 isprovided at its periphery with pockets or holes 2, these being located to apply glue at the spots or portions of the blank as desired as, for example, at the spots 3 of blank 4 in Figure 5. a

Each hole or pocket is preferably substantially cylindrical and extends inwardly from the 1 periphery of wheel 1. The depth of each pocket .is very substantially greater than the diameter,

or other dimension, of the pocket at the periphery of the wheel for the purposes describedabove and preferably such depth is more than twice as great as such diameter or other dimension. Each end face of wheel 1 is provided with a spiral groove 5, (only one being shown) this groove carrying glue to provide lubrication between the side scrapers 6 (to be later described) 119 and the end faces of the wheel and also serving to prevent leakage by preventing wear of the parts, said groove working the glue or other adhesive back into the pot.

The scraper 7 has an edge 8 tangential to, and preferably contacting with, the wheel and of arcuate form, the dimension of this edge along the periphery of the wheel being at least as great a as the opening of the pocket at said periphery,

the scraper, in the form shown, extending transversely of the machine along the entire length of the wheel and slightly beyond the end faces thereof.

The blank is suitably fed along the path indicatedby the line 9 and between the wheel 1 and the corrugated roller 10 which may be operated in any suitable way and preferably at the same surface speed as that of the wheel 1, the glue being deposited on top of the blank.

The side scrapers 6 rest on the scraper 7 and prevent leakage between the scrapers 6 and scraper I. Said scrapers 6 may beheld in position by screws 11 on the frame engaging rece :ses 12 in the side scrapers. Shoulders l3 prevent leakage around the side scrapers. Said scrapers 6 are a close fit to theends of the wheels.

The scraper 'l is attached to the frame by screws 14 and is slotted for adjustability and screw 15 is provided for such adjustment and to give positive pressure against the outer end of the scraper to press the edge 8 against the wheel 1.

Wheel 1 has hub 16 and is keyed to shaft 1'7v which may be operated in any suitable way. The hubs 16 turn in the bearings of the glue pot which is supported on shafts l7 and 18, the latter being fixed and preventing rotation of the glue pot.

The outer wall of. the glue pot is indicated at 19, the glue wheel itself forming a wall.

My wheel has pockets of such depth that alternate pressure and vacuum effects are created in the pockets, the depth being such thatall the air can not escape. Moreover the pockets are of such capacity compared to the peripheral exposure of the pockets that the adhesive cannot harden in the pockets by oxidation.

It will be clear that the pockets in my wheel are grouped to correspond with certain predetera mined areas of the blank to which adhesive is to be applied and that I provide means for reto momentarily compress adhesive into said pockets to cause the adhesive to project from the pockets when the compression is over.

What I claim is: r

l. A device of the character described comprising a rotary member having pockets which are open at the periphery of said member,"the depth of a pocket being greater than twice the distance across its opening; and means to force adhesive into said pockets; and means extending peripherally completely across each pocket to prevent the adhesive from by-passing. i

.2. The combination of a wheel provided with pockets to receive adhesive,'the depth of each pocket being at least twice the distance across its opening to confine air at all times at the base of the pocket to create-alternate pressure and vacuum effects in the pocket; and a member col 6 operating with said pockets to accomplish said effects.

3. A device of the character described comprising a rotary member having pockets which are open at the periphery of said member, the depth of a pocket being at least twice the distance across its opening to confine air at all times at the bases of the pockets; means to force adhesive into said pockets; and means extending peripherally completely across each pocket to prevent the adhesive from by-passing, the axis of said rotary member and said extending means having a fixed relation when operating.

' 4. A device of the character described co'mpris ing a rotary member having cylindrical pockets which are open at the periphery of said member, the depth of a pocket being at leasttwice the distance across its opening to confine air at all times at the bases of the pockets; means to force adhesive into said pockets; and means extending peripherally completely across each pocket to prevent the adhesive from by-passing.

5. A device'of the character described comprising a rotary member having pockets which are open at the periphery of said member, the depth of each pocket being at least twice the distance across its opening to confine air at all times at the bases of the pockets; means to force adhesive into said pockets; and means extending peripherally completely across each pocket to prevent the adhesive from by-passing. v

6. The combination of a wheel provided with pockets to receive adhesive, the depth of each pocket being at least twice the distance across its opening so that all the air in said pockets can not escape; and a member cooperating with said pockets to prevent the escape of all of said air.

7. In a mechanism of the character described a rotary member having a plurality of pockets in its periphery, said pockets grouped to correspond with certain predetermined areas of a blankv to which glueis to be applied, the depth of each pocket being at least twice the distance across its opening to confine air at all times at the bases of the pockets; and means to momentarily compress glue into said pockets to cause the air to force the glue from said pockets when the compressing action is over.

8. In a mechanism of the character described a rotary member comprising pockets in its periphery, the depth of each pocket being at least twice the distance across its opening to confine air at all times at the bases of the pockets; and means for removing glue from the surface of said member adjacent to said pockets and to momentarily compress glue into said pockets to cause said air to efiect a projection of the glue from the pockets when the compressing action is over. v

9. A device of the character described comprising a rotary member having pockets which are open at the periphery of said member, the depth of a pocket being at least twice the distance across its opening to confine air at all times at the bases of the pockets; and a member having one face to force adhesive into said pockets and having another face extending peripherally complete- 1y across each pocket to prevent the adhesive from by-passing.

HAROLD J. GOSS.

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