US3756494A

US3756494A - Drum with plastic liner

Info

Publication number: US3756494A
Application number: US00209637A
Authority: US
Inventors: H Becker; H Gardner
Original assignee: Greif Bros Corp
Current assignee: Greif Inc
Priority date: 1971-12-20
Filing date: 1971-12-20
Publication date: 1973-09-04
Anticipated expiration: 1990-09-04
Also published as: CA958991A

Abstract

A lined fiber drum is constructed of essentially regular components which are arranged in a novel manner. According to a preferred embodiment, these regular parts generally employed for constructing an all fiber drum are assembled together with a plastic bag and an additional bottom disc. This disc is inserted interiorly and at the base of the bag, and both are inserted into the drum body shell and located at the intended bottom end thereof. The drum inner shell is inserted into the body shell exteriorly of the side of the plastic bag and the shells are then secured to one another in the usual fashion. Thereafter, the regular bottom disc is placed over the base of the bag and interiorly of the bottom end of the outer shell and the base of the drum is formed in a conventional manner. Thus, the bag is fixed in place and will not lift out of the drum; and the drum may therefore be conveniently arranged for customer filling. After filling, the customer seals off the bag and pushes the excess of the bag into the drum. A conventional cover is then mounted on the top of the drum.

Description

United States Patent n 1 Becker, Jr. et al.

DRUM WITH PLASTIC LINER Inventors: Herbert W. Becker, Jr., East Brunswick; Harry R. Rahway, both of NJ.

Gardner,

Assignee: Greif Bros. Corporation,

[52] U.S. C1 229/14 B [51] Int. Cl B65d 25/00 [58] Field of Search 229/14 R, 14 B, 14 BE; 220/63 R [56] References Cited UNITED STATES PATENTS 2,134,166 10/1938 Wilcox 229/14 BE 2,721,674 10/1955 Lazard 229/14 B UX 2,727,673 12/1955 Bergstrom 229/14 B 1,054,932 3/1913 Norman 229/14 B UX 2,785,795 3/1957 Ryno 229/14 BE X 3,321,070 5/1967 Childs 229/14 B X 3,357,626 12/1967 Carpenter 229/14 B Sept. 4, 1973 l l l l [57] ABSTRACT A lined fiber drum is constructed of essentially regular components which are arranged in a novel manner. According to a preferred embodiment, these regular parts generally employed for constructing an all fiber drum are assembled together with a plastic bag and an additional bottom disc. This disc is inserted interiorly and at the base of the bag, and both are inserted into the drum body shell and located at the intended bottom end thereof. The drum inner shell is inserted into the body shell exteriorly of the side of the plastic bag and the shells are then secured to one another in the usual fashion. Thereafter, the regular bottom disc is placed over the base of the bag and interiorly of the bottom end of the outer shell and the base of the drum is formed in a conventional manner. Thus, the bag is fixed in place and will not lift out of the drum; and the drum may therefore be conveniently arranged for customer filling. After filling, the customer seals off the bag and pushes the excess of the bag into the drum. A conventional cover is then mounted on the top of the drum.

4 Claims, 10 Drawing Figures Z/ I f 1: /t 1 /j 24 v ,6 20- 4,, /4/% PATENTEBSEP 4 ma SHEEI 2 [IF 3 DRUM WITH PLASTIC LINER BACKGROUND OF THE INVENTION Plastic lined drums are becoming increasingly popular in shipping and storage practices. Drums of this type are desirable because they are relatively inexpensive and light-weight because the plastic liners afford numerous advantages and characteristics such as imperviousness and chemical inertness. Towards this end, fiber drums having liners associated with the interior thereof are used for shipping and storing food-stuffs and the like as well as other commercial products such as delicate and frangible electrical components, all of which should be protected and shielded from the environment or ambient, particularly damp or relatively high humidity conditions.

A number of various types of lined drums have been employed for the foregoing purposes. Several designs require special molding techniques for the liner as well as assembly techniques and procedures that are not considered standard in the trade. Of course, this type of lined drum will generally be relatively expensive. In

an effort to minimize the cost of components and as-,

sembly of lined drums, a standard drum would merely be provided with a separately molded liner which is inserted or dropped into the drum interior in a rather loose and unsecured manner. In these instances, the customer would have difficulty in filling the liner and even worse, the liner would, from time to time, become disassociated from the drum and lost.

SUMMARY OF THE INVENTION A principal object of this invention is to provide an improved plastic lined drum of light weight and relatively inexpensive construction which utilizes a drum of conventional construction and only standard parts and components.

A further object is to provide a plastic lined drum of the foregoing type in which the liner is permanently secured within the drum interior and may not be lifted out by the customer during filling or disassociated or lost therefrom prior thereto.

These and other objects and advantages are most effectively attained by the plastic lined drum construction illustrated in the accompanying drawings.

DESCRIPTION OF THE DRAWINGS In the accompanying drawings:

FIG. 1 is an exploded perspective view showing the components of the plastic lined drum of this invention;

FIG. 2 is a perspective view showing the plastic bag or liner pulled over the inner bottom disc whichis supported on an assembly jig;

FIG. 3 is a similar perspective view showing the projecting points of the heat sealed bag bottom folded over and taped or glued in place;

FIG. 4 is a perspective view and shows the bag with the disc snugly fitted therein in the process of being pushed to the bottom of the drum interior; 7

FIG. 5 shows the bag and internally located disc fully inserted into the drum interior and the inner shell being pushed down into the outer body shell;

FIG. 6 is a perspective view showing the inner shell fully inserted into the outer body shell and the upper projecting part of the bag folded over the drum exterior for customer loading;

FIG. 7 is a perspective view showing the top of the liner sealed after customer loading;

FIG. 8 is a perspective view showing the loaded drum and sealed liner with the drum top cover mounted in place to complete the drum assembly;

FIG. 9 is a longitudinal sectional view taken along the line 9-9 of FIG. 8; and

FIG. 10 is an enlarged fragmentary sectional view of the completed plastic lined drum.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A regular all fiber cylindrical or noncylindrical drum employing standard parts or components is utilized in the present invention. Thus, in the drawings, a cylindrical drum of this type is illustrated and reference is made to commonly owned US. Pat. No. 3,042,288 granted July 3, I962 and US. Pat. No. 3,104,599 granted Sept. 29, 1963, for a drum construction of the non-cylindrical type. The illustrated drum includes a substantially cylindrical outer body shell 20 provided with a bottom closure 22 and an internally mounted inner shell 24, the exposed portion of which is adapted to receive cover 26. These drum parts and components are standard as is the case with the drum construction and assembly. In addition to these standard parts, a plastic heat sealed bag 28 of conventional construction and an extra bottom disc,30 is employed.

The assembly of the foregoing parts is as follows: in this connection specific reference is made to FIGS. 2 to 8. Initially, the bag 28 of substantially cylindrical construction with a heat sealed bottom is pulled over the bottom disc 30. For ease of assembly the bottom disc 30 may be supported on an assembly jig 32. The laterally projecting points or corners 34 present at the bag bottom are folded over and taped as at 36 or otherwise glued or secured in place to obtain the optimum circular conformation of the bag bottom (see FIG. 3). Thereafter, the bag 28 with interiorly mounted or disposed disc 30 is pushed down to the bottom of the outer drum body shell 20 which will have previously been provided with a standard bottom closure 22 (see FIG. 4). The disc 30 possesses a diameter sufficient to permit the disc to adopt a snug fit within the interior of the body shell 20.

The inner shell 24 is next pushed down into the body shell 20 as shown in FIG. 5 with the base of the inner shell forced into engagement with the base of the liner 28 and associated surfaces of' the disc 30 to thereby hold this bag in itsldisc at the bottom of the drum. In accordance'with the usual practice, the inner shell is glued or'otherwise secured to the outer shell so that the former cannot come out (see FIG. 10). The glue applications may be performed in the usual manner and at a convenient time prior to the insertion of the inner shell 24 into the body shell 20.

The bag 28 may now be pulled up and folded over the drum exterior and particularly the exterior of the inner shell 24 for convenient customer loading as shown in FIG. 6. Inasmuch as the bag 28 will not lift out, customer filling is expedited.

After filling, the customer need only seal the top of the bag in a manner suggested by FIG. 7. Thereafter,

the excess and top portion of the sealed upper portion Thereafter, the cover 26 is placed over and on top of the drum in the conventional way. Thus, the product filled by the customer has excellent protection in the drum of this invention which, in substantially all aspects, is standard in construction and only slightly higher in cost.

Thus, the several aforenoted objects and advantages are most effectively attained. Although a single somewhat preferred embodiment of the invention has been disclosed and described in detail herein, it should be understood that this invention is in no sense limited thereby and its scope is to be determined by that of the appended claims.

What is claimed is:

l. A plastic lined drum comprising a tubular body having a base, a bottom closure extending across said base, a plastic liner open at one end and closed at the other end disposed interiorly of the tubular body with the liner closed end being disposed adjacent the bottom closure at the base of the tubular body, means for anchoring the closed end of the liner to the base of the tubular member and across the interior of the bottom closure, the tubular body including an outer body shell and an inner shell secured to one another with the base of the inner shell disposed adjacent the bottom closure, 3 disc disposed interiorly of the liner adjacent the closed end thereof and snugly fitting in the body shell adjacent the bottom closure with the closed end of the liner interposed between the disc and the bottom closure and the base of the inner shell and the bottom closure having interposed therebetween peripheral portions of the bottom closed end of the liner and the disc thereby locking the disc and consequently the closed end of the liner at the base of the drum preventing the liner from lifting out of the drum interior.

2. The invention in accordance with claim 1 wherein the inner shell includes a top portion extending beyond the top of the body shell and a cover extending across the top of the drum and about the exterior of the inner shell.

3. The invention in accordance with claim 2 wherein the drum is provided with an essentially circular crosssection throughout.

4. The invention in accordance with claim 2 wherein the drum includes a cross-section throughout defined ing said sides that are rounded.

Claims

1. A plastic lined drum comprising a tubular body having a base, a bottom closure extending across said base, a plastic liner open at one end and closed at the other end disposed interiorly of the tubular body with the liner closed end being disposed adjacent the bottom closure at the base of the tubular body, means for anchoring the closed end of the liner to the base of the tubular member and across the interior of the bottom closure, the tubular body including an outer body shell and an inner shell secured to one another with the base of the inner shell disposed adjacent the bottom closure, a disc disposed interiorly of the liner adjacent the closed end thereof and snugly fitting in the body shell adjacent the bottom closure with the closed end of the liner interposed between the disc and the bottom closure and the base of the inner shell and the bottom closure having interposed therebetween peripheral portions of the bottom closed end of the liner and the disc thereby locking the disc and consequently the closed end of the liner at the base of the drum preventing the liner from lifting out of the drum interior.

3. The invention in accordance with claim 2 wherein the drum is provided with an essentially circular cross-section throughout.

4. The invention in accordance with claim 2 wherein the drum includes a cross-section throughout defined by sides that are transversely convex and corners joining said sides that are rounded.