US3712464A - Package and method of forming - Google Patents

Package and method of forming Download PDF

Info

Publication number
US3712464A
US3712464A US00049270*[A US3712464DA US3712464A US 3712464 A US3712464 A US 3712464A US 3712464D A US3712464D A US 3712464DA US 3712464 A US3712464 A US 3712464A
Authority
US
United States
Prior art keywords
package
half sections
portions
heating
heated
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
US00049270*[A
Other languages
English (en)
Inventor
H Gentry
J Chapman
C Baker
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.)
Mead Corp
Original Assignee
Mead Corp
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 Mead Corp filed Critical Mead Corp
Application granted granted Critical
Publication of US3712464A publication Critical patent/US3712464A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/08—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure
    • B65B47/10—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure by vacuum
    • 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2203/00—Decoration means, markings, information elements, contents indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
    • B65D2571/00006—Palletisable loads, i.e. loads intended to be transported by means of a fork-lift truck
    • B65D2571/00012—Bundles surrounded by a film
    • B65D2571/00018—Bundles surrounded by a film under tension
    • B65D2571/00024—Mechanical characteristics of the shrink film
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/54—Cards, coupons or other inserts or accessories

Definitions

  • An article package comprises a pair of complementary cavity defining half sections constituting opposite portions of an article enveloping structure, and a pair of seams forming oppositely disposed junctions between a pair of opposite edges of one half section and the corresponding edges of the other half section.
  • the package half sections are formed'of heat shrinkable sheet material which is stretched initially to form the cavities and the heating pattern and stretching operation are such that the corners of the resulting cavity defining half sections are not stretched to an unduly thin condition. After the package is formed heat is applied in a predetermined manner so as to shrink the half sections into conformity with the packaged items and so as to control the thickness of certain areas of both half sections.
  • a pair of half sections are individually formed by a heating and stretching operation, and such half sections constitute complementary portions of a completed article enveloping structure, the half sections being secured to each other along a pair of seams disposed medially of the package.
  • the half sections are formed in such manner that the portions thereof which constitute the comers of the completed package are not unduly thin and hence are sufficiently strong and after assembly of a package, an application of heat is made to cause the half sections to shrink into conformity with the packaged items.
  • a combination reinforcing and labeling sheet may be secured to the half sections and disposed astride one of the seams.
  • Perforate areas may be formed in the reinforcing and labeling sheet and in the half sections and disposed astride one of the seams to form finger gripping apertures when ruptured.
  • FIG. I is a perspective view of a completed package constructed according-to the invention.
  • FIG. 2 is an end view of the package depicted in FIG. 1;
  • FIG. 3 is a side view of the package depicted in FIG.
  • FIG. 4 is an enlarged sectional view taken along the line designated 4-4 in FIG. 1;
  • FIG. 5 is a cross sectional view of a straight-walled mold and a schematic representation of four stages of the forming process whereby a sheet of stretchable and heat shrinkable film is formed into a cavity defining half section wherein the film is at uniform temperature,
  • FIG. 6 is a view similar to FIG. 5 wherein certain areas of the film are heated to higher temperatures than other areas;
  • FIG. 7 is a schematic cross sectional view of a hot air nozzle employed to effect differential heating of the FIG. 8A is a view along line 8A8A in FIG. 7;
  • FIG. 8B is a sectional view taken on line 88-88 in FIG. 8A;
  • FIGS. 9A is a diagrammatic representation of the temperature gradient across the width of a strip of plastic film heated by the nozzle of FIGS. 7, 8A and 8B;
  • FIG. 9B is a cross sectionalview of the plastic film I and its side clamping means
  • FIG. 10A is a side elevation view of a schematically represented nozzle structure for applying heat to the sides and comers of the completed package to shrink the package into conformity with the packaged items.
  • FIG. 10B is an end view of the carton and nozzle arrangement of FIG. 10A;
  • the packaged cans are designated at C and are enveloped by a pair of half sections generally designated by the numerals l and 2. These half sections 1 and 2 define a pair of cavities whichenvelope the primary packages designated C.
  • the half section 1 is complementary to the half section 2 and is secured thereto along top seam 3 and bottom seam 4.
  • the seams 3 and 4 could constitute any suitable type of known junction such as is formed by directing a blast of hot air or the like against closely secured edges of the half sections 1 and 2.
  • the ends of the package are open as indicated at 5 although for some applications of the invention it may be desirable to provide a package having closed ends.
  • a sheet of material designated by the numeral 6 may be disposed astride the seam 3 and secured to the adjacent portions of half sections 1 and 2.
  • the combination reinforcing and labeling sheet 6 strengthens the package along the seam 3 and provides suitable means for labeling the primary packages C and, if desired, affords a limited amount of billboard space.
  • a pair of perforate areas designated by the numerals 7 and 8 are formed in the portions of half sections 1 and 2 which are disposed immediately adjacent the seam 3 and such areas extend into the reinforcing and labeling sheet 6 as indicated by the perforated semi-circular lines 9 and 10.
  • fingers are simply inserted against the areas 7 and 8 and pushed downwardly to rupture the material along the perforate lines and to cause the portions. enclosed within the circular areas 7 and 8 to swing downwardly and inwardly and thus form a suitable carrying mechanism for the package as is obvious from FIG. 1.
  • the half sections 1 and 2 preferably are formed by a vacuum process which when applied to a cavity defining half shell to the edges of which a strip of heat sealable stretchable material is secured causes the material to conform with the inner surface of the half shell.
  • a vacuum stretching operation an application of heat is made to the plastic sheet. Care must be taken to control the application of heat so as to prevent undue thinning of the sheet as the'forrning operation is completed at the comers of the half shell.
  • the material F is ordinarily a sheet of non-oriented plastic film of substantially uniform thickness.
  • the half shell is designated by the letter S and a pair of gripping elements G1 and G2 engage the edges of Film F and hold the edges in secure engagement with the edges of the half shell.
  • Vacuum is applied from outside the shell S through the ports schematically shown at P1 P2 and P3.
  • the film F is caused to assume a bowed configuration through. various stages designated for example by F1, F2, F3, F4, and F5.
  • Stage F4 the center portion of the film is in secure engagement with the bottom portio'nSl-of the shell S and the film F is also in engagement with the sides S2 and S3 of shell S.
  • substantial heat is given up by the film by conduction to the bottoms andsides of .shell S when stage F4 is reached.
  • Continued application of vacuum pressure through ports P1 and P3 thus tends to impart a substantial stretching and thinning action to the corner portion of Film F until it arrives at the complete stage designated at F5. If the operation proceeded as described in connection with FIG. 5, it is obvious that the corner portions of the half shell would be quite weak in the areas designated generally by the numerals l0 and l l.
  • corner portions 10-2 and 11-2 are somewhat thicker than the remaining portions of the half section.
  • the corner portions designated as F 5-2 are perhaps of the same general thicknessas the remaining portions of the half section.
  • the corner portions may be slightly thicker than the remaining portions depending on the particular degree and manner of application of heat as by a special nozzle.
  • baffles such as 12 and 13 are utilized in the hot air nozzle so as to reduce the heating of the film F in the regions which ultimately become the corners and which in the drawings are designated by the numerals 10-2 and 1 1- 2. Openings 12A and 13Aallow the flow of air. Since. these areas are heated to a lesser degree than other areas of the film, the areas 10-2 and 11-2 do not stretch and become thin as much as other areas during the final stages of the stretching operation represented at F5 in FIG. 5 and at F5-2 in FIG. 6.
  • FIG. 7 is schematic and FIGS. 8A and 8B simply represent front and side views of the nozzle shown schematically in FIG. 7.
  • FIG. 9A The temperature of the film across its width is represented by FIG. 9A.
  • FIG. 9B simply is a schematic cross sectional representation of FILM F and of the edges S2 and S3 of the shell S as well as grippers 1 and 2.
  • FIG. 9A represents the temperature of film F from one side to the other.
  • the low points of the temperature diagram T are represented by the numerals 10-2 and 11-2 and as is obvious from the above description and from FIG. 6 correspond to the portions of the film which ultimately become the comersof the half section.
  • the data represents a film having a high modulus of elasticity and a high glass transition temperature.
  • lower temperatures can be used.
  • shrinkage heat is deployed in a specifie manner.
  • top panel which extends between corners 10-2 and 10-2 and the bottom panel which extends between comers 1l-2. and 11-2- in FIG. 2 received less orientation than side panels betweencorners 10-2 and 11-2, it is desired to shrink this area less and thereby maintain maximum impact strength.
  • the desired effect can be achieved by firstdirecting heat at the package corners to allow material in these areas to thicken before any appreciable shrink tension is developed in the film shell.; -After the corners have been allowed to thicken, heat isthen directed at the side panels (14 and 15) to increase tension of the film by shrinking over a much larger area, thereby producing a tight package by stressing the material around the package comers and to produce required tension in the top-panel.
  • Heat is deployed by a nozzle design depicted in FIG. 10A and FIG. 108. As the package moves across the stationary nozzle of FIG. 10A, the comers are first heatedatNl and after shrinking locally heat is applied to the sides at N2.
  • the temperature of the film should be in the range between F. and 225 F for a period from I to 4 seconds.
  • the heating nozzle is discontinued at the comers at position N3 but inter,- mediate parts of the side panels are heated until N4 is transversed;
  • Such heat application provides balanced orientation by not destroying orientation in areas of low initial orientation such as the top and bottom panels.
  • a pair of complementary cavity defining half sections formed of non-oriented polyvinylchloride and forming opposite portions of an article enveloping structure disposed about the article group, a pair of seams forming oppositely disposed junctions between a pair of opposite edges of one of said half sections with the corresponding edges of the other half section, said half sections being stretch formed of heat scalable and orientable sheet material and said seams being disposed generally medially of 'the package and adjacent the 'ends of the packaged articles, the corner portions of said half sections which interconnect the sidewalls of the article enveloping structure withthe top and bottom walls being heated to a lower temperature than the adjacent portions of said structure during the forming process thereby to limit the thinning of such corner portions during stretching, and a combination reinforcing and labeling sheet disposed astride'one of said seams and secured to adjacentportions of said half sections.
  • a package according to claim 1 wherein the corner portions of the package are heated after formation of the package to cause shrinkage and thickening of said corner portions and wherein the sides of the package are heated following heating of the corner portions sufficiently to impart article conforming shrinkage thereto but without restoring said side walls to a fully non-oriented condition.
  • a method of forming a package comprising the steps of heating a pair of sheets of heat shrinkable plastic material of substantially uniform thickness in such manner that certain areas thereof adjacent the corner portions are heated to higher temperatures than the corner areas, imparting a sheet stretching force to said sheets to form two series of package half sections and so as to impart a greater degree of stretch to the areas heated to higher temperatures than said comer areas whereby the thickness of said certain areas is reducedto a greater extend than the thickness of said comer areas, securing complementary half sections together about the contents of a package and heating the corners of both half sections prior to heating other portions while continuing the heating of said other portions after cessation of heating of said corner portions to shrink the half sections about the contents of the package.
  • a method of forming a package comprising the steps of drawing each of a pair of sheets of plastic material into cavity defining cube-like shells respectively to form a pair of half sections, heating said sheets duringand prior to the drawing of said sheets into said shells in such manner that areas thereof adjacent the corner forming portions thereof are heated to higher temperatures than the corner forming portions, moving said half sections into enveloping relation relative to one or more articles to be packaged, securing opposite edges of said half sections together, and heating the package sequentially and in such manner that the corners of the package are heated first and in a manner to cause thickening thereof and so as to cause article conforming shrinkage of the package following heating of the comers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Packages (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Wrappers (AREA)
US00049270*[A 1970-11-03 1970-11-03 Package and method of forming Expired - Lifetime US3712464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4927070A 1970-11-03 1970-11-03

Publications (1)

Publication Number Publication Date
US3712464A true US3712464A (en) 1973-01-23

Family

ID=21958952

Family Applications (1)

Application Number Title Priority Date Filing Date
US00049270*[A Expired - Lifetime US3712464A (en) 1970-11-03 1970-11-03 Package and method of forming

Country Status (10)

Country Link
US (1) US3712464A (enExample)
AU (1) AU3023371A (enExample)
BE (1) BE768911A (enExample)
BR (1) BR7105741D0 (enExample)
CA (1) CA962634A (enExample)
DE (1) DE2131151A1 (enExample)
ES (2) ES396256A1 (enExample)
FR (1) FR2112409A1 (enExample)
NL (1) NL7108548A (enExample)
ZA (1) ZA713848B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993549A (en) * 1987-12-04 1991-02-19 Salomon S.A. Packaging and process of packaging a ski
US20080264818A1 (en) * 2005-11-28 2008-10-30 Sidel Participations Pack Including a Flange Which Partially Covers a Group of Articles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010262A (en) * 1958-10-08 1961-11-28 Jr Herbert Rumsey Method of making packages wrapped in flexible sheet material
US3027044A (en) * 1959-03-24 1962-03-27 Hedwin Corp Container or drum liner
US3217874A (en) * 1963-05-27 1965-11-16 Union Carbide Corp Packaging for a plurality of containers
US3371462A (en) * 1963-12-10 1968-03-05 Nordkvist Allan Method of packing a number of containers in one unit
US3414181A (en) * 1965-06-29 1968-12-03 Union Carbide Corp Partial deorientation of segments of bioriented thermoplastic sheet
US3527855A (en) * 1967-04-28 1970-09-08 Standard Packaging Corp Film-forming method and apparatus
US3586162A (en) * 1969-06-05 1971-06-22 Sun Chemical Corp Dispensing container for yarn and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010262A (en) * 1958-10-08 1961-11-28 Jr Herbert Rumsey Method of making packages wrapped in flexible sheet material
US3027044A (en) * 1959-03-24 1962-03-27 Hedwin Corp Container or drum liner
US3217874A (en) * 1963-05-27 1965-11-16 Union Carbide Corp Packaging for a plurality of containers
US3371462A (en) * 1963-12-10 1968-03-05 Nordkvist Allan Method of packing a number of containers in one unit
US3414181A (en) * 1965-06-29 1968-12-03 Union Carbide Corp Partial deorientation of segments of bioriented thermoplastic sheet
US3527855A (en) * 1967-04-28 1970-09-08 Standard Packaging Corp Film-forming method and apparatus
US3586162A (en) * 1969-06-05 1971-06-22 Sun Chemical Corp Dispensing container for yarn and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993549A (en) * 1987-12-04 1991-02-19 Salomon S.A. Packaging and process of packaging a ski
US20080264818A1 (en) * 2005-11-28 2008-10-30 Sidel Participations Pack Including a Flange Which Partially Covers a Group of Articles
US7878328B2 (en) * 2005-11-28 2011-02-01 Sidel Participations Pack including a flange which partially covers a group of articles

Also Published As

Publication number Publication date
NL7108548A (enExample) 1972-05-05
FR2112409A1 (enExample) 1972-06-16
BE768911A (fr) 1971-11-03
BR7105741D0 (pt) 1973-04-05
ES173474U (es) 1972-03-01
ES173474Y (es) 1972-11-01
CA962634A (en) 1975-02-11
DE2131151A1 (de) 1972-05-04
ZA713848B (en) 1972-04-26
ES396256A1 (es) 1974-04-16
AU3023371A (en) 1973-01-04

Similar Documents

Publication Publication Date Title
US3497059A (en) Package and method for making same
US2750719A (en) Packaging method
US4555025A (en) Shrink bag with integral handle
US4083451A (en) Method of heat sealing sheet-form layers of perforated plastic between layers of paperboard
US3192681A (en) Method of forming blister type packages
US3216832A (en) Suction packaging method
US3387766A (en) Plastic bags
JPH04161304A (ja) 耐熱性中空容器のための一次ブロー成形品
US3414181A (en) Partial deorientation of segments of bioriented thermoplastic sheet
US3712464A (en) Package and method of forming
US7306694B2 (en) Method for producing plastic products with reinforced heat sealed joints
JPH07165266A (ja) 気体圧入膨張形包装用紙製緩衝材とその製造方法
DE102007028056A1 (de) Luftkammer-Verpackungsfolie mit Seitenpuffereffekt
US3355303A (en) Bread package
US4056138A (en) Flexible plastic container
US3233725A (en) Card display packaging
US3396841A (en) Readily openable package assembly
JPS6344341Y2 (enExample)
GB881784A (en) Improvements in the manufacture of packages, especially of the infusion bag type
IE33526B1 (en) Improvements in a method for manufacturing a block bag
USRE26494E (en) Robert gottschalk
US1718441A (en) Package
US3492776A (en) Method of packaging objects between sheets secured to a frame
US3015386A (en) Packaging fluent products
JPS6344612B2 (enExample)