US3719167A - Device for applying adhesive to envelopes,bags or the like - Google Patents

Device for applying adhesive to envelopes,bags or the like Download PDF

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Publication number
US3719167A
US3719167A US00053554A US3719167DA US3719167A US 3719167 A US3719167 A US 3719167A US 00053554 A US00053554 A US 00053554A US 3719167D A US3719167D A US 3719167DA US 3719167 A US3719167 A US 3719167A
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US
United States
Prior art keywords
roller
adhesive
envelopes
reservoir
gumming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00053554A
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English (en)
Inventor
B Pahlitzsch
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Individual
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Individual
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Publication date
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Publication of US3719167A publication Critical patent/US3719167A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

Definitions

  • a gumming roller for applying self-sealing latex adhesive to a series of overlapping envelopes is rotated in opposition to the direction of conveyance of the envelopes so that all or nearly all of the adhesive is wiped off the roller onto their exposed flaps.
  • the roller is cyclically lifted, together with an associated adhesive reservoir off the envelopes to produce two separate bands of adhesive on each envelope, one band on the flap and another band on the body of the envelope.
  • the present invention relates to a device for applying adhesive to envelopes, bags or the like, particularly in connection with the use of a so-called self-sealing adhesive.
  • a gumming roller rotates in the direction of transfer of the overlapping envelopes, the peripheral speed of the gumming roller being equivalent to the transfer speed of the envelopes.
  • the liquid adhesive is applied to the exposed parts of the envelope flaps in a rolling fashion.
  • This known device operates satisfactorily as long as it is dealing with a conventional adhesive in the form of a gum which has to be moistened to close the envelope.
  • this device When applying the self-sealing kind of adhesive, however, this device has substantial drawbacks.
  • the latex rubber contained in the adhesive mass which consists of latex dissolved in salamonniac, is indeed spread over the exposed flaps of the envelopes; however, during continuous operation, irregularities in the gumming process occur as hardened latex granules are applied to the surfaces being gummed and have an undesired effect at the time of closure of the envelope.
  • the object of the present invention is to overcome this drawback and to create a self-sealing gum coating which is free of any faults and of any granules of hardened latex adhesive.
  • a gumming roller for envelopes, bags or similar flat articles is arranged to be supplied with a fiowable adhesive from a reservoir and is driven independently of the article conveying means 3,719,167 Patented Mar. 6, 1973 in opposition to the transport direction of the articles to be gummed.
  • the latex adhesive is removed fully from the roller so that there can be no question of any hardening of the adhesive on said roller since the latter is supplied continuously and exclusively with fresh adhesive taken from the reservoir.
  • This complete removal of the adhesive from the roller surface is due to the fact that the gumming roller rotates in the opposite direction to the movement of the envelopes so that, as it were, the adhesive is actually scraped olf the roller.
  • This measure ensures proper application of the adhesive without any risk of the formation on the roller of residues which, when a self-sealing adhesive is used, would inevitably lead to the formation of hard latex granules on the gummed surfaces.
  • the drive of the gumming roller can be adjusted to give different peripheral speeds.
  • the rate of application of the self-sealing adhesive can be adapted to the particular composition of the latex composition so that trouble-free spreading thereof is ensured.
  • the reservoir carries the gumming roller, is sealed off in airtight fashion and is formed with respective slots extending over the length of the gumming roller serving on the one hand to discharge the adhesive and on the other to readmit any excess adhesive adhering to the roller.
  • the reservoir along with the gumming roller can be lifted rhythmically by the envelopes as a function of their trans port speed.
  • the reservoir may be secured to one end of a bellcrank lever which is arranged to pivot approximately about its center and whose other end co-operates with a cam track controlling the rhythmic lifting of the gumming roller.
  • a cam disc used for this purpose may be provided with dwells of differing diameter and length, a dwell of larger diameter corresponding to the width of the gumming strip and a dwell of smaller diameter corresponding to the ungummed interval between the strips.
  • cam disc to control the lifting movement is an advantage inasmuch as the cam can be positively driven as a function of the operating cycle of the machine and the length of the time of lift can be adjusted by the smaller-diameter cam so that the desired ungummed zone has the necessary width.
  • FIG. 1 is a sectional lateral elevation of a device embodying my invention.
  • FIG. 2 is a plan view of the device.
  • envelopes or bags 3, arranged in mutually overlapping fashion for gumming purposes are transported by feed rollers 2 on a conveyor path 1 and pass beneath a gumming roller 4 which rotates in a direction opposite to the transport direction left to right of the envelopes 3.
  • the gumming roller 4 is driven by a shaft 5 with its own independent drive mechanism (not shown) whose speed can be adjusted.
  • a reservoir 6 In contact with the gumming roller 4 there is a reservoir 6 which is closed off in an air-tight fashion and contains latex adhesive. Between the closed reservoir 6 and the gumming roller 4 two slots 6a and 6b are formed, the adhesive exiting through the slot 6a and any residual adhesive being returned through the slot 6b to the reservoir 6.
  • the reservoir 6 is mounted upon a bracket 7 which is provided with a pair of screws 8 for accurate adjustment of the width of slot 6a.
  • the bracket 7 is secured to a standard 9, spring-loaded screws 9a thereover serving to adjust the width of slot 6b.
  • the attachment of the bracket 7 to the standard 9 is effected by a toggle bar 10.
  • the standard 9 has a horizontal arm 11 which is fixedly held in an arm 12 by means of a pinch screw 13.
  • the arm 12 is secured to a shaft 14 which is rotatably mounted in a side plate 16 of the machine frame in a bearing 17.
  • a second lever is attached, this lever carrying a roller 18 held by a spring 20 into contact with a rotating cam 19.
  • the cam 19 has longer dwells 21 of larger diameter and shorter dwells 22 of smaller diameter.
  • the lower slot 6a serving to dispense the adhesive composition, is formed between the gumming roller 4 and a lower wall of the housing of reservoir 6 extending generally radially toward that roller, the upper slot 6b for the return of excess adhesive being defined by the crest of the roller and an overhanging upper housing wall of the reservoir.
  • roller 4 adjoins an open side of the reservoir, formed between these two walls, and (as indicated by the arrow in FIG. 1) rotates across that open side through an arc of substantially 90, representing the elfective peripheral spacing of the two slots, in a direction from upper slot 6b to lower slot 6a.
  • roller 4 and reservoir 6 on their common support 9 remains, of course, unchanged during the alternate raising and lowering of the support by 49 the cam 19; this position can be varied only by operation of the two sets of screws 8 and 9a (upon the unclamping of bracket 7 by toggle bar 10), these two sets of adjusting screws being eifective in mutually orthogonal directions (horizontal and vertically, respectively).
  • the shaft 5 of this roller passes with clearance through side walls of the bracket as shown at 7 and 7" in FIG. 2.
  • the connection between support 9 and shaft 5, required to raise and lower the roller jointly with reservoir 6, has not been illustrated.
  • a device for applying adhesive to a series of flat articles moving along a predetermined transport path comprising:
  • a reservoir above said path containing a flowable adhesive composition said reservoir having an open side;
  • a horizontal gumming roller rotatably journaled on said support adjacent said open side with access to the contents of said reservoir, the latter defining with said roller a pair of slots spaced apart substantially along the roller periphery for dispensing said composition and for a return of excess adhesive to said reservoir, said roller projecting downwardly beyond said reservoir for contact with said articles;
  • transport means for continuously moving said articles along said path underneath said roller and said reservoir;
  • adjustment means comprise first and second screw means for relatively shifting said reservoir and said roller in a horizontal and vertical direction.
  • a device as defined in claim 2 wherein said reservoir has a longer upper wall overlying said roller and defining therewith one of said slots, said reservoir further having a shorter lower wall extending generally radially toward said roller and defining therewith the other of said slots.
  • roller is provided with means for rotating same past said open side in a direction from said one to said other of said slots.
  • a device as defined in claim 1 wherein said drive means comprises a cam disk with a longer dwell for lowering said support and a shorter dwell for raising said support.

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  • Making Paper Articles (AREA)
  • Package Closures (AREA)
US00053554A 1969-07-17 1970-07-09 Device for applying adhesive to envelopes,bags or the like Expired - Lifetime US3719167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691937081 DE1937081A1 (de) 1969-07-17 1969-07-17 Vorrichtung zur Aufbringung einer Gummierung auf die Verschlussklappen von Briefumschlaegen,Beuteln od.dgl.

Publications (1)

Publication Number Publication Date
US3719167A true US3719167A (en) 1973-03-06

Family

ID=5740464

Family Applications (1)

Application Number Title Priority Date Filing Date
US00053554A Expired - Lifetime US3719167A (en) 1969-07-17 1970-07-09 Device for applying adhesive to envelopes,bags or the like

Country Status (3)

Country Link
US (1) US3719167A (enExample)
DE (1) DE1937081A1 (enExample)
GB (1) GB1295127A (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844249A (en) * 1972-03-17 1974-10-29 Miller Pottery Eng Co Tracer type stripe printing system
US4603060A (en) * 1984-01-20 1986-07-29 Mitsubishi Denki Kabushiki Kaisha Method of manufacturing an electrode for a fuel cell
US5385610A (en) * 1993-10-06 1995-01-31 Hoover Universal, Inc. Self-adjusting roll coater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844249A (en) * 1972-03-17 1974-10-29 Miller Pottery Eng Co Tracer type stripe printing system
US4603060A (en) * 1984-01-20 1986-07-29 Mitsubishi Denki Kabushiki Kaisha Method of manufacturing an electrode for a fuel cell
US5385610A (en) * 1993-10-06 1995-01-31 Hoover Universal, Inc. Self-adjusting roll coater

Also Published As

Publication number Publication date
DE1937081A1 (de) 1971-01-28
GB1295127A (enExample) 1972-11-01

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