US3839117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a plastic-covered glass container
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1973-03-29
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Granted: 1974-10-01
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Expires: 1993-03-29
Abstract
Abstract The disclosure relates to a method of making a container comprised of a glass bottle and a plastic covering thereon. The plastic is processed into sheet form and highly oriented for shrink property along one dimension. A minor orientation (onehalf or less) is provided in the other dimension. The sheet is pre-printed and formed into strips fed to a mandrel-type machine for making individual, lap-seamed, cylindrical sleeves of the plastic, the major shrink orientation being oriented circumferentially of the sleeve. The sleeves are telescopically located to a predetermined height on a rigid base article, a bottle that has been preheated to around 220*F and the sleeve and bottle carried into an oven for shrinking the plastic onto the bottle. Differential surface skin is provided in the plastic, the greater depth skin being placed next to the bottle. Bottle heat is furnished either: (1) by an auxiliary pre-heat oven, or (2) by heat of formation of the container in its manufacture, such as obtained in the annealing lehr. The initial placement of the sleeve allows a bottom end overlap of the sleeve on the bottle and shrinking the plastic results in covering the bottle at least along its body, bottom corner and onto the bottom end at an annular bearing surface thereon.
Inventors
- 👤 S Amberg
- 👤 T Doherty
- 👤 J Karabedian
- 👤 C Heyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:10
CPC Classifications
B; B65; B65C; B65C3/00; B65C3/06; B65C3/065; B29; B29C; B29C63/00; B29C63/38; B29C63/42; B29C63/423; B29C63/426; B41; B41F; B41F17/00; B65D; B65D23/00; B65D23/08; B65D23/0842; B65D23/0878; B65D5/00; B29C2793/00; B29C2793/0081; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C53/00; B29C53/36; B29C53/38; B29C53/40; B29C65/00; B29C65/02; B29C65/18; B29L; B29L2031/00; B29L2031/712; B29L2031/7158; B29L2031/744; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
The method comprising the steps of extruding a thermoplastic material in a longitudinal direction, forming the extrusion into flat sheet form extending in said longitudinal direction, applying longitudinal tension to said sheet form in the direction of extrusion to stretch the thermoplastic material and highly orient it in said longitudinal direction, trimming the stretched sheet to a predetermined width dimension, printing one surface of the sheet with a decoration, cutting the printed sheet longitudinally into plural strips such that their transverse dimension is equal to the height of a tubular sleeve to be formed therefrom, accumulating the individual strips in lengths for use in making said sleeves, cutting said strips individually into successive lengths to form flat sleeve blanks having a length slightly in excess of the circumference of a mandrel, wrapping the blank lengthwise around the mandrel so that the opposite ends overlap, seaming the overlapped portions of the blank on the mandrel to form a tubular sleeve, and stripping the tubular sleeve axially off of the mandrel.
Claim 2
Independent Claim
169 words
The method comprising the steps of extruding a thermoplastic material in a longitudinal direction, forming the extrusion into flat sheet form extending in said longitudinal direction, applying longitudinal tension to said sheet form in the direction of extrusion to stretch the thermoplastic material and highly orient it in said longitudinal direction, trimming the stretched sheet to a predetermined width dimension, printing one surface of the sheet with a decoration, cutting the printed sheet longitudinally into plural strips such that their transverse dimension is equal to the height of a tubular sleeve to be formed therefrom, accumulating the individual strips in lengths for use in making said sleeves, cutting said strips individually into successive lengths to form flat sleeve blanks having a length slightly in excess of the circumference of a mandrel, wrapping the blank lengthwise around the mandrel so that the opposite ends overlap, seaming the overlapped portions of the blank on the mandrel to form a tubular sleeve, and stripping the tubular sleeve axially off of the mandrel.
Claim 3
Dependent Claim
56 words
The method defined in claim 1, wherein said printing step includes printing indicia on each strip spaced lengthwise thereof at intervals corresponding to a sleeve blank length, orienting the sleeve blank lengths between successive indicia, and cutting the oriented strips to sleeve blank lengths, thereby registering the decoration in the successive blanks cut from said strip.
Claim 4
Independent Claim
143 words
The method of making shrinkable thermoplastic sleeve-like members comprising feeding a rolled length of shrinkable thermoplastic material having a predetermined width equal to the height dimension of said sleeve member onto a feed drum, holding the strip of said drum by vacuum, cutting successive sleeve blank lengths of the strip on said feed drum, moving the leading edge of each cut length into engagement with a mandrel, holding the leading edge of the blank length on the mandrel by vacuum and releasing the vacuum hold on the cut strip by said feed drum, wrapping the blank length on the mandrel by rotating the latter, the mandrel being of lesser circumference than the length of said blank, thereby overlapping the ends of said blank, connecting the overlapped ends to each other to form a seamed sleeve, and stripping the sleeve axially from the mandrel.
Claim 5
Independent Claim
143 words
The method of making shrinkable thermoplastic sleeve-like members comprising feeding a rolled length of shrinkable thermoplastic material having a predetermined width equal to the height dimension of said sleeve member onto a feed drum, holding the strip of said drum by vacuum, cutting successive sleeve blank lengths of the strip on said feed drum, moving the leading edge of each cut length into engagement with a mandrel, holding the leading edge of the blank length on the mandrel by vacuum and releasing the vacuum hold on the cut strip by said feed drum, wrapping the blank length on the mandrel by rotating the latter, the mandrel being of lesser circumference than the length of said blank, thereby overlapping the ends of said blank, connecting the overlapped ends to each other to form a seamed sleeve, and stripping the sleeve axially from the mandrel.
Claim 6
Dependent Claim
46 words
The method defined in claim 3, wherein the overlapped ends of said wrapped sleeve blank are connected by moving a heated elongated member into contact with the overlapped thermoplastic and disposed along the height thereof, and applying pressure by said member radially inwardly on said mandrel.
Claim 7
Dependent Claim
59 words
The method defined in claim 4, wherein the leading edge of the blank length is moved into engagement with the mandrel and the mandrel is rotated one and one-half revolutions in wrapping the blank length thereon, the heated elongated member being disposed to one side of the mandrel diametrically opposite the location whereat the blank length engages the mandrel.
References Cited (Backward Citations)
US3235433A
Cited
US3510378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |