US3029569A - Method of sealing containers - Google Patents

Method of sealing containers Download PDF

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Publication number
US3029569A
US3029569A US818090A US81809059A US3029569A US 3029569 A US3029569 A US 3029569A US 818090 A US818090 A US 818090A US 81809059 A US81809059 A US 81809059A US 3029569 A US3029569 A US 3029569A
Authority
US
United States
Prior art keywords
container
ledge
diaphragm
sheet
tape
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
US818090A
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English (en)
Inventor
Taylor William Edward
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primerica Inc
Original Assignee
American Can Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by American Can Co filed Critical American Can Co
Priority to US818090A priority Critical patent/US3029569A/en
Priority to CH589360A priority patent/CH369064A/fr
Application granted granted Critical
Publication of US3029569A publication Critical patent/US3029569A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/168—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying and securing double closures

Definitions

  • the present invention relates to a method of sealing containers and has particular reference to a method of forming and applying a flexible, resealable, protective diaphragm to the upper end of a container body.
  • Such a container comprises a shallow tray-like body for receiving the tablets, the body being provided with a.
  • ledge which extends completely around its upper end and forms a seat for an imperforate sealing diaphragm which is impervious to atmospheric moisture and gases and thus provides the desired protection for the tablets.
  • This diaphragm is adhered to the sealing ledge by a pressure sensitive adhesive which is carried on the lower surface of the diaphragm and which permits the diaphragm to be peeled back from a corner of the body to create a dispensing opening of a size which permits dispensing therethrough of a single tablet when the body is inverted. After the dispensing operation has taken place, the diaphragm is pressed back upon the body ledge to reseal the container until such time as the next tablet is Wanted, whereupon the just described dispensing operation is repeated. Due to the fact that pressure sensitive adhesive remains permanently tacky, the sealing efiiciency of the diaphragm remains effective throughout the normal life of the package.
  • the present invention contemplates a method of forming and applying a sealing diaphragm wherein the individual diaphragms comprise segments of predetermined length which are cut without waste from a supply roll of tape of a suitable width.
  • the present invention contemplates the use of tape having its undersurface completely coated with a film of the pressure sensitive adhesive.
  • a masking sheet of a size which just fits into the upper end of the body is positioned in the mouth of each container so that it rests upon the tablets contained therein prior to the application of the tape.
  • the masking sheet interposes itself between the tablets and the adhesive carried on the tape.
  • the marginal ICC portions of the applied tape segment are firmly pressed against the body ledge to form a secure adhesive bond therebetween, and the medial portion of the tape segment is pressed into contact with the masking sheet to combine thesetwo parts into a unitary structure which becomes the completed sealing diaphragm.
  • the tablets serve as backing-up surfaces which insure contact between the two par-ts during the pressure applying step.
  • An object of the invention therefore is to provide a method of forming and applying a pressure sensitive sealing diaphragm to the upper end of a container in a simple and economical manner.
  • Another object is the provision of such a method which permits the use of a supply roll of tape which has a complete overall adhesive coating on one of its surfaces, so thatv the need for registering preprinted adhesive patterns is completely obviated.
  • Still another object is the provision of a methodof forming and applying sealing diaphragms wherein a masking sheet is positioned on the product in the container and interposed between the product and an adhesive coated tape segment in order to prevent adhesion of the product to the tape segment.
  • FIGURE 1 is a perspective view of an empty container body provided with a ledge for receiving a sealing diaphragm
  • FIG. 2 is a view similar to FIG. 1 but showing the body with tablets in place therein;
  • FIG. 3 is a view showing the step of placing a masking sheet on the tablets in the open end of the body
  • FIG. 4 is a view illustrating the method steps of cutting individual diaphragm segments from a roll of solidly coated pressure sensitive tape, positioning such segments on the upper ends of the container bodies,v and applying pressure to the upper surfaces of the segments to firmly press them into engagement with the body ledges and with the masking sheets to form completed sealing diaphra'gms;
  • FIG. 5 is a perspective view of a container with a completed sealing diaphragm in place thereon;
  • FIG. 6 is the perspective view of a container wherein p .the sealing diaphragm has been peeled back from the body ledge to form a dispensing opening at one corner of the body.
  • the drawings illustrate a method of applying a sealing diaphragm to the upper end of a fiat, traylike, container body 10 which is preferably formed of a suitable smooth-surfaced plastic material such as polystyrene, high density polyethylene, or the like.
  • the body 10 is formed with a shallow contents-receiving recess 12 and a continuous fiat horizontal ledge 14 which com pletely surrounds the recess 12 and is provided at its opposite ends with bevels 15.
  • the recess 12 is filled with the container contents, here shown as individual tablets '16, which extend up to a level slightly below the ledge 14.
  • a masking sheet 18, preferably formed of a piece of inexpensive fibre stock is placed upon tablets, as seen in FIG. 3.
  • the masking sheet 18 is pref.- erably fed from a stack 20 of such sheets and placed in position upon the tablets in any suitable manner.
  • the masking sheet 18 is slightly less in both length and width than is the recess 12 so that it fits easily into the recess and does not project onto the ledge 14, and is preferably of such thickness that its upper surface is substantially coplanar with the ledge 14.
  • the sheet 22 preferably is cut from a supply r011 25 of pressure sensitive tape 26 which is mounted on a spindle 28 and has its inside surface completely coated with the pressure sensitive adhesive 24.
  • Pressure sensitive adhesive is widely known in the art and may be defined as an adhesive which is normally tacky and non-drying and which adheres by pressing without the need of activation by water, solvents or heat. Examples of such adhesives are disclosed in United States Patents 2415:6380, 2,628,058, 2,328,066, 2,410,053, 2,410,079 and 2,532,011. Pressure sensitive tapes formed with such adhesives have as their main characteristic the fact that they may be stripped from smooth nonfibrous surfaces which do not possess special chemical affinity for the adhesive without offsetting of the adhesive on such surfaces, and consequently are capable of being repeatedly separated from and re-united to such surfaces.
  • the leading end of the tape 26 is wound around a positively driven applicator wheel 30 in such manner that the tape surface carrying the adhesive 24 is disposed away from the wheel 30 and never comes into contact with it.
  • the wheel 30 is keyed for rotation to a positively driven shaft 32, and the tape 24 is held tightly in engagement with the outer periphery of the wheel 30 by means of vacuum which is applied to its inside surface through a series of vacuum lines or bores 34 which are evenly spaced completely around the wheel and have their inner ends offset to bring them into alignment with an arcuate vacuum port 36 formed in a stationary vacuum manifold positioned against an end of the wheel 30.
  • the port 36 is connected to a suitable source of vacuum in the usual manner.
  • the tape 26 is carried around by the wheel 30, it is cut into body length sheets 22 by a rotary knife blade 38 which is carried in a cutting wheel 40 mounted tangentially to and rotated at the same peripheral speed as the applicator wheel 30.
  • the circumferential length of the cutting wheel 40 equals the length of a body 10 while the circumferential length of the wheel 30 is preferably made a multiple (here shown as three) of such body length, so that when the two wheels are rotated in unison, the knife blade 38 successively enters cutting notches 42, which are formed at body length intervals around the periphery of the wheel 30, and thus cuts the tape 26 into the body length segments 22.
  • the filled bodies 10 with the masking sheets 18 in position therein are passed beneath the applicator wheel 30 in end-to-end engagement and in substantially tangential relationship to the applicator wheel 30, and in registry therewith so that the leading edge of a cut sheet 22 is positioned immediately above the forward end of each body 10 as it passes beneath the axis of the Wheel 30.
  • the lineal forward speed of the bodies 10 is equal to the peripheral speed of the applicator wheel 30 and as a result, a sheet 22 is deposited on the body ledge 14 of each body 10 as it passes beneath the applicator wheel 30 with the adhesive 24 on the sheet 22 in contact with the ledge 14 and also with the upper surface of the masking sheet 18.
  • the arcuate vacuum port 36 terminates at a position such that the vacuum in the bores 34 is cut off at the point of application of the sheet 22 to the body ledge 14, thus progressively releasing the sheet 22 so the adhesion between the ledge 14 and the sheet 22 strips the sheet 22 from the applicator 30.
  • a vent port (not shown) may be provided in the manifold to break the vacuum in the bores 34 at this point.
  • the roller 44 presses the adhesive coated marginal portions of the sheet 22 into firm engagement with the body ledge 14 and simultaneously presses its adhesively coated center portion into firm contact with the masking sheet 18, thereby uniting the two sheets into a unitary diaphragm, Pressured engagement between the sheets 18, 22 is made possible by the fact that the masking sheet 18 is supported and backed up by the tablets 16 during this pressure applying step. These pressure applying steps complete the method of the instant invention.
  • the tape 26 may be applied to the bodies 10 and thereafter severed into individual segments.
  • the pressure applying step may be accomplished simultaneously with the application of the tape of the body ledge 14. This could be easily done with the illustrated mechanism by forming the applicator wheel 30, with a resilient surface so that it will also function as a pressure wheel.
  • FIGURE 5 shows a container after the method steps have been completed.
  • the marginal end portions of the diaphragm overhang the bevelled recesses 15 and thus may be easily grasped by the consumer.
  • the latter desires to dispense a tablet from the sealed body, he grasps a free end portion of the diaphragm and peels the diaphragm back along the body ledge 14, preferably from a corner of the body, to create a triangular dispensing opening (see FIG. 6) through which a single tablet drops when the container is inverted. Thereafter, the diaphragm is pressed back into engagement with the ledge 14 in order to reseal the body. Since the pressure sensitive adhesive 24 remains permanently tacky, this dispensing operation can be repeated until the tablets 16 have been completely dispensed from the body 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
US818090A 1959-06-04 1959-06-04 Method of sealing containers Expired - Lifetime US3029569A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US818090A US3029569A (en) 1959-06-04 1959-06-04 Method of sealing containers
CH589360A CH369064A (fr) 1959-06-04 1960-05-23 Procédé pour fermer de façon étanche et amovible un récipient pour comprimés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US818090A US3029569A (en) 1959-06-04 1959-06-04 Method of sealing containers

Publications (1)

Publication Number Publication Date
US3029569A true US3029569A (en) 1962-04-17

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ID=25224643

Family Applications (1)

Application Number Title Priority Date Filing Date
US818090A Expired - Lifetime US3029569A (en) 1959-06-04 1959-06-04 Method of sealing containers

Country Status (2)

Country Link
US (1) US3029569A (fr)
CH (1) CH369064A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123960A (en) * 1964-03-10 Apparatus for preparing
US3178865A (en) * 1961-05-04 1965-04-20 Vacuumatic Ltd Closures for containers
US4002009A (en) * 1975-08-21 1977-01-11 Dynatech Laboratories, Incorporated Combination tape dispenser and tray sealer device
US4111119A (en) * 1976-04-05 1978-09-05 Olympus Optical Co., Ltd. Record sheet clamping mechanism for drum type facsimile and the like
US5102485A (en) * 1989-02-01 1992-04-07 International Paper Company Apparatus for continuous feeding and synchronized application of fitments to carton blanks and related method
US5622028A (en) * 1995-07-25 1997-04-22 Harp; Ralph E. Pharmaceutical unit dose package sealing apparatus and method
US5704473A (en) * 1996-05-13 1998-01-06 Sabine, Inc. Music strings and packaging

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8631049D0 (en) * 1986-12-31 1987-02-04 Odin Dev Ltd Packaging

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1536341A (en) * 1920-07-14 1925-05-05 Eastman Kodak Co Dental x-ray-film package
US2002591A (en) * 1932-05-27 1935-05-28 Stephen P F Sneed Box opening device
US2219487A (en) * 1938-10-27 1940-10-29 Nyden Robert Sheet metal container
US2565509A (en) * 1946-07-27 1951-08-28 Balys C Marcin Manufacture of tapes and sheets with adhesive coatings on opposite sides thereof
US2715861A (en) * 1953-11-27 1955-08-23 Minnesota Mining & Mfg Platen tape applying
US2738916A (en) * 1953-08-17 1956-03-20 Thomas B R Peters Closures and seals for cartons
US2784539A (en) * 1952-08-20 1957-03-12 Louis Silver Package and methods for making the same
US2834456A (en) * 1955-07-18 1958-05-13 American Cyanamid Co Frangible tablet packaging

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1536341A (en) * 1920-07-14 1925-05-05 Eastman Kodak Co Dental x-ray-film package
US2002591A (en) * 1932-05-27 1935-05-28 Stephen P F Sneed Box opening device
US2219487A (en) * 1938-10-27 1940-10-29 Nyden Robert Sheet metal container
US2565509A (en) * 1946-07-27 1951-08-28 Balys C Marcin Manufacture of tapes and sheets with adhesive coatings on opposite sides thereof
US2784539A (en) * 1952-08-20 1957-03-12 Louis Silver Package and methods for making the same
US2738916A (en) * 1953-08-17 1956-03-20 Thomas B R Peters Closures and seals for cartons
US2715861A (en) * 1953-11-27 1955-08-23 Minnesota Mining & Mfg Platen tape applying
US2834456A (en) * 1955-07-18 1958-05-13 American Cyanamid Co Frangible tablet packaging

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123960A (en) * 1964-03-10 Apparatus for preparing
US3178865A (en) * 1961-05-04 1965-04-20 Vacuumatic Ltd Closures for containers
US4002009A (en) * 1975-08-21 1977-01-11 Dynatech Laboratories, Incorporated Combination tape dispenser and tray sealer device
US4111119A (en) * 1976-04-05 1978-09-05 Olympus Optical Co., Ltd. Record sheet clamping mechanism for drum type facsimile and the like
US5102485A (en) * 1989-02-01 1992-04-07 International Paper Company Apparatus for continuous feeding and synchronized application of fitments to carton blanks and related method
US5622028A (en) * 1995-07-25 1997-04-22 Harp; Ralph E. Pharmaceutical unit dose package sealing apparatus and method
US5704473A (en) * 1996-05-13 1998-01-06 Sabine, Inc. Music strings and packaging

Also Published As

Publication number Publication date
CH369064A (fr) 1963-04-30

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