US3443717A - Plastic crate structure with lattice-work bottom - Google Patents
Plastic crate structure with lattice-work bottom Download PDFInfo
- Publication number
- US3443717A US3443717A US636961A US3443717DA US3443717A US 3443717 A US3443717 A US 3443717A US 636961 A US636961 A US 636961A US 3443717D A US3443717D A US 3443717DA US 3443717 A US3443717 A US 3443717A
- Authority
- US
- United States
- Prior art keywords
- lattice
- crate
- bars
- rings
- crate structure
- 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
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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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/40—Details of walls
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
Definitions
- a crate structure includes a bottom moulded from plastic material and which is constituted by a lattice made up from a criss-cross network of diagonally extending bars which intersect one another at their mutual crossing points. Stress relieving rings are incorporated into some of the intersections between the bars to prevent deformation of the cratebottom in the event that initial stresses are developed in the bottom as a result of the moulding operation. The rings are arranged in mutually perpendicular rows along the bottom and are located at every other intersection along each of the diagonally extending bars.
- the present invention refers to a lattice-work made from a plastic material by compression or injection moulding. More closely the invention relates to a crate, the bottom of which is made of such lattice-work.
- a more particular object is to provide an improved crate structure in which the bottom of the crate is moulded from plastic material and constituted by a crisscross network of diagonally extending bars which intersect one another at their mutual crossing points.
- Stress relieving rings are incorporated into some of the intersections between the bars to prevent deformation of the bottom in the event that initial stresses are developed in the bottom as a result of the moulding operation.
- the rings are arranged in mutually perpendicular rows along the bottom and are located at every other intersection along each of the diagonally extending bars.
- FIG. 1 is a perspective view of a crate upon which the invention has been applied.
- FIG. 2 is a bottom view of the crate
- FIG. 3 is a cross-sectional view of the crate along the line III-III in FIG. 2.
- the crate as shown in FIG. 1 generally consists of two short side walls 1; two long side walls 2; and a bottom 3.
- FIG. 2 more closely shows the design of the bottom 3. From the figure, in which the bottom is seen from below, it is apparent that the bottom has the shape of a lattice, i.e. a criss-cross network consisting of diagonally running bars. The bars run from below left up to the right, as the bars 4 and 4", and from below right up to the left, as the bars 5' and 5". Conventional intersecting structure between the two sets of diagonally extending bars, as for example the points where the bars 4 and 5' or 4" and 5" cross, are broadly denoted by numeral 6. In other intersections, however, rings 7 are structurally incorporated for the purpose of relieving stresses in the lattice.
- a lattice i.e. a criss-cross network consisting of diagonally running bars.
- the bars run from below left up to the right, as the bars 4 and 4", and from below right up to the left, as the bars 5' and 5".
- Numeral 7a stands for a ring which join the bars 4" and 5'
- 7b is a ring which connects the bars 4 and 5" with each other.
- the rings 7 are arranged in mutually perpendicular rows and are located at every other intersection along each of the diagonally extending bars.
- Some of the rings are completely filled with plastic. These completely filled rings, as the ring 8, define the injection points for the plastic material.
- the rings 7 function as stress-absorbers in that they can be compressed as well as expanded. If the stresses are symmetrical the rings 7 in both the cases will tend to assume a square shape.
- a crate structure including a bottom moulded from plastic material, said bottom being constituted by a crisscross network of diagonally extending bars which intersect one another at their mutual crossing points, and stressrelieving rings incorporated into some of the said intersections between said bars to prevent deformation of the bottom in the event that initial stresses are developed therein as a result of the moulding operation.
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Description
y 1969 1.. M. R. WETTLEN ET AL 3,443,717
PLASTIC CRATE STRUCTURE WITH LATTICE-WORK BOTTOM Filed May a, 1967 Sheet of 2 May 13, 1969 1.. M. R. WETTLEN ET AL 3,443,717
PLASTIC CRATE STRUCTURE WITH LATTICE-WORK BOTTOM Filed May a, 1967 Sheet 3 of 2 3,443,717 PLASTIC CRATE STRUCTURE WITH LATTICE- WORK BOTTOM Lars Malte Roland Wettlen, Lomma, and Curt Ingvar Christopherson, Hassleholm, Sweden, assignors to AB Tetra Pak, Lund, Sweden, a Swedish company Filed May 8, 1967, Ser. No. 636,961 Claims priority, application Sweden, May 9, 1966, 6,340/ 66 Int. Cl. B65d 7/42; E04c 2/42; E04f 19/10 U.S. Cl. 220-66 3 Claims ABSTRACT OF THE DISCLOSURE A crate structure includes a bottom moulded from plastic material and which is constituted by a lattice made up from a criss-cross network of diagonally extending bars which intersect one another at their mutual crossing points. Stress relieving rings are incorporated into some of the intersections between the bars to prevent deformation of the cratebottom in the event that initial stresses are developed in the bottom as a result of the moulding operation. The rings are arranged in mutually perpendicular rows along the bottom and are located at every other intersection along each of the diagonally extending bars.
The present invention refers to a lattice-work made from a plastic material by compression or injection moulding. More closely the invention relates to a crate, the bottom of which is made of such lattice-work.
One has long manufactured plastic crates, the bottoms of which for several reasons have been provided with apertures or other recesses. According to the present construction the bottom is intended to consist of a latticework, whereby a considerable saving of material is achieved at the same time the crate will be easy to wash. One has, however, noted that due to the forming methods considerable internal stresses are obtained in the latticework. These may cause a non-desired deformation of the bottom of the crate and its walls which cannot be tolerated.
It is therefore an object of the invention to eliminate or at least considerably reduce these stresses. This problem is according to the invention, solved by insertion of stress relieving rings in at least certain of the intersections of the lattice network.
A more particular object is to provide an improved crate structure in which the bottom of the crate is moulded from plastic material and constituted by a crisscross network of diagonally extending bars which intersect one another at their mutual crossing points. Stress relieving rings are incorporated into some of the intersections between the bars to prevent deformation of the bottom in the event that initial stresses are developed in the bottom as a result of the moulding operation. The rings are arranged in mutually perpendicular rows along the bottom and are located at every other intersection along each of the diagonally extending bars.
The invention will now be more closely described with reference to the accompanying drawings, in which:
States Paten ice FIG. 1 is a perspective view of a crate upon which the invention has been applied.
FIG. 2 is a bottom view of the crate, and
FIG. 3 is a cross-sectional view of the crate along the line III-III in FIG. 2.
The crate as shown in FIG. 1 generally consists of two short side walls 1; two long side walls 2; and a bottom 3.
FIG. 2 more closely shows the design of the bottom 3. From the figure, in which the bottom is seen from below, it is apparent that the bottom has the shape of a lattice, i.e. a criss-cross network consisting of diagonally running bars. The bars run from below left up to the right, as the bars 4 and 4", and from below right up to the left, as the bars 5' and 5". Conventional intersecting structure between the two sets of diagonally extending bars, as for example the points where the bars 4 and 5' or 4" and 5" cross, are broadly denoted by numeral 6. In other intersections, however, rings 7 are structurally incorporated for the purpose of relieving stresses in the lattice. Numeral 7a stands for a ring which join the bars 4" and 5', and 7b is a ring which connects the bars 4 and 5" with each other. The rings 7 are arranged in mutually perpendicular rows and are located at every other intersection along each of the diagonally extending bars.
Some of the rings are completely filled with plastic. These completely filled rings, as the ring 8, define the injection points for the plastic material.
In the case of stresses in the crate bottom, e.g. thermal stresses, the rings 7 function as stress-absorbers in that they can be compressed as well as expanded. If the stresses are symmetrical the rings 7 in both the cases will tend to assume a square shape.
We claim:
1. A crate structure including a bottom moulded from plastic material, said bottom being constituted by a crisscross network of diagonally extending bars which intersect one another at their mutual crossing points, and stressrelieving rings incorporated into some of the said intersections between said bars to prevent deformation of the bottom in the event that initial stresses are developed therein as a result of the moulding operation.
2. A crate structure as defined in claim 1 wherein said stress-relieving rings are located at every other intersection along the diagonally extending bars.
3. A crate structure as defined in claim 1 wherein said stress-relieving rings are arranged in mutually perpendicular rows and are located at every other intersection along the ldiagonally extending bars.
References Cited UNITED STATES PATENTS 2,850,153 9/1958 Cosentino 22083 3,107,026 10/1963 DeChelbor 22.0-21 3,223,280 12/1965 Kazimier 220'-10'2 FOREIGN PATENTS 659,127 3/ 1963 Canada.
JOSEPH R. LECLAIR, Primary Examiner.
I. R. GARRETT, Assistant Examiner.
U.S. Cl. X.R. 52669; 220-83
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE634066 | 1966-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3443717A true US3443717A (en) | 1969-05-13 |
Family
ID=20268427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US636961A Expired - Lifetime US3443717A (en) | 1966-05-09 | 1967-05-08 | Plastic crate structure with lattice-work bottom |
Country Status (5)
Country | Link |
---|---|
US (1) | US3443717A (en) |
CH (1) | CH473710A (en) |
DE (1) | DE6608379U (en) |
GB (1) | GB1142663A (en) |
NL (1) | NL6705996A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3727791A (en) * | 1970-10-08 | 1973-04-17 | Phillips Petroleum Co | Tray |
US4023680A (en) * | 1971-09-22 | 1977-05-17 | Dare Plastics Inc. | Bakery tray |
US5685452A (en) * | 1992-10-21 | 1997-11-11 | Perstorp Ab | Container bottom with elevations made of a polymeric material and a process for production thereof |
US6076697A (en) * | 1997-06-09 | 2000-06-20 | Allabaugh, Jr.; Robert Carleton | Crate for cartons |
US6703110B2 (en) | 2002-01-28 | 2004-03-09 | Rubbermaid Incorporated | Non-skid surface for containers |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3014387A1 (en) * | 1980-04-15 | 1981-10-22 | Fritz Schäfer GmbH Fabriken für Lager- und Betriebseinrichtungen, Salchendorf bei Neunkirchen, Kreis Siegen, 5908 Neunkirchen | STORAGE DISPLAY BOX |
CA2229191C (en) * | 1998-03-11 | 2001-03-06 | Christopher M. Flink | Ergonomic hand-held shopping basket |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850153A (en) * | 1955-04-15 | 1958-09-02 | Ful Vuepak Company | Disposable carton |
CA659127A (en) * | 1963-03-12 | S. Levkoff Henry | Plastic container | |
US3107026A (en) * | 1959-11-13 | 1963-10-15 | Novo Ind Corp | Carrying case for soft drinks and the like |
US3223280A (en) * | 1964-07-29 | 1965-12-14 | Amos Thompson Corp | Molded beverage carrier |
-
1967
- 1967-04-26 GB GB19164/67A patent/GB1142663A/en not_active Expired
- 1967-04-27 NL NL6705996A patent/NL6705996A/xx unknown
- 1967-05-08 DE DE6608379U patent/DE6608379U/en not_active Expired
- 1967-05-08 CH CH647467A patent/CH473710A/en not_active IP Right Cessation
- 1967-05-08 US US636961A patent/US3443717A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA659127A (en) * | 1963-03-12 | S. Levkoff Henry | Plastic container | |
US2850153A (en) * | 1955-04-15 | 1958-09-02 | Ful Vuepak Company | Disposable carton |
US3107026A (en) * | 1959-11-13 | 1963-10-15 | Novo Ind Corp | Carrying case for soft drinks and the like |
US3223280A (en) * | 1964-07-29 | 1965-12-14 | Amos Thompson Corp | Molded beverage carrier |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3727791A (en) * | 1970-10-08 | 1973-04-17 | Phillips Petroleum Co | Tray |
US4023680A (en) * | 1971-09-22 | 1977-05-17 | Dare Plastics Inc. | Bakery tray |
US5685452A (en) * | 1992-10-21 | 1997-11-11 | Perstorp Ab | Container bottom with elevations made of a polymeric material and a process for production thereof |
US6076697A (en) * | 1997-06-09 | 2000-06-20 | Allabaugh, Jr.; Robert Carleton | Crate for cartons |
US6703110B2 (en) | 2002-01-28 | 2004-03-09 | Rubbermaid Incorporated | Non-skid surface for containers |
Also Published As
Publication number | Publication date |
---|---|
NL6705996A (en) | 1967-11-10 |
DE6608379U (en) | 1971-08-26 |
GB1142663A (en) | 1969-02-12 |
CH473710A (en) | 1969-06-15 |
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