U.S. patent number 3,552,579 [Application Number 04/778,706] was granted by the patent office on 1971-01-05 for tile case assembly and stacking clip therefor.
This patent grant is currently assigned to Safco Products Co.. Invention is credited to Carl S. Ahlberg, Benjamin Fiterman, Marlyn D. Johnson, Leonard M. Paletz, Peter A. Simon.
United States Patent |
3,552,579 |
Simon , et al. |
January 5, 1971 |
**Please see images for:
( Certificate of Correction ) ** |
TILE CASE ASSEMBLY AND STACKING CLIP THEREFOR
Abstract
A flexible, T-shaped clip having retention shoulders projecting
from the opposite ends of its elongated crossmember as well as from
the free end of its central web section is utilized to hold a
plurality of stacked fiberboard containers together by inserting
the retention shoulders of the crossmember in aligned apertures of
adjoining, vertical sidewalls of two containers and engaging the
opposed shoulders on the horizontally extending web section in the
abutting top and bottom walls of the two containers through
apertures therein. Raised beads on the retention shoulders assist
in holding them in locking engagement with the apertured walls of
the containers.
Inventors: |
Simon; Peter A. (Minneapolis,
MN), Paletz; Leonard M. (Minneapolis, MN), Fiterman;
Benjamin (Minneapolis, MN), Johnson; Marlyn D.
(Minneapolis, MN), Ahlberg; Carl S. (Minneapolis, MN) |
Assignee: |
Safco Products Co.
(Minneapolis, MN)
|
Family
ID: |
25114193 |
Appl.
No.: |
04/778,706 |
Filed: |
November 25, 1968 |
Current U.S.
Class: |
211/126.12;
206/821; 312/108; 24/336; 229/915; 312/111 |
Current CPC
Class: |
A47B
87/02 (20130101); Y10S 229/915 (20130101); Y10S
206/821 (20130101); Y10T 24/344 (20150115) |
Current International
Class: |
A47B
87/00 (20060101); A47B 87/02 (20060101); A47b
087/02 (); F16b 012/10 () |
Field of
Search: |
;211/126,177,134,148
;312/111,108,107,257 ;287/189.35
;24/73BMF,73HSMF,73BCMF,73PF,73.7,73.8P,73,208.3 ;85/5,80 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Britts; Ramon S.
Claims
We claim:
1. A fastening device for securing a plurality of file cases
together in a multiple compartment assembly comprising:
an elongated crossmember with inwardly extending lock shoulders on
the opposite ends thereof;
and a central web section of flat, planar configuration projecting
from said elongated crossmember substantially perpendicular
thereto, and defining therewith a T-shaped clip, said web section
having lock shoulders projecting from the opposite sides thereof,
said lock shoulders on said crossmember and on said web section
being adapted to firmly engage the walls of abutting cases through
apertures therein.
2. A fastening device as defined in claim 1 wherein:
said clip is manufactured as an integral unit from vinyl resin.
3. A fastening device as defined in claim 1 wherein:
each of said lock shoulders on the opposite ends of said
crossmember comprises an inwardly extending portion projecting at
an angle from said crossmember and a lip depending from the inner
edge of each of said inwardly extending portions on the side
thereof facing said web section, whereby said lock shoulders may
extend inwardly over the walls of said cases through said apertures
therein and be held in firm engagement therewith by the gripping of
said shoulder lips against the inside surface of said casing
walls.
4. In an assembly of file cases positioned adjacent each other, a
plurality of improved fastening devices holding said cases together
to provide a multiple compartment unit wherein each of said
fastening devices comprises:
a T-shaped clip having a crossmember overlying aligned, coplanar
walls of two of said cases, and a web section lying between two
abutting walls of said cases extending at right angles and adjacent
to said coplanar walls, said web section comprising a single,
planar member; and
lock portions on the opposite ends of said crossmember and on the
opposite sides of said web section, said lock portions being
secured in engagement with said casing walls through apertures
formed therein.
5. The structure of claim 4 wherein:
said casings are slit to form hinged flaps in said walls which may
be displaced to provide said apertures; and
said clips include outwardly angling elements on said ends of said
crossmember and on the opposite sides of said web, said elements
serving to push said flaps inwardly to thereby open said apertures
within which said lock portions are engaged.
6. A clip for securing a plurality of file cases together to form a
multiple compartment assembly comprising:
an elongated, flexible member having retention shoulders extending
angularly from the opposite ends thereof, said shoulders being
adapted to engage apertures in adjoining, coplanar walls of two
file cases positioned in abutting engagement with each other;
an inwardly turned lip on each of said shoulders; said lips being
adapted to hold said shoulders in locking engagement with said
apertured walls; and
outwardly sloping tabs on the opposite ends of said flexible member
depending from said retention shoulders, said tabs being adapted to
inwardly displace hinged flaps covering said apertures in said
walls of said cases.
7. A clip as defined in claim 6, wherein said flexible member is
bowed outwardly away from said shoulders to thereby impart an
inwardly directed spring action to said outer ends thereof to
assist in maintaining said shoulders in gripping contact with said
casing walls.
Description
BACKGROUND OF THE INVENTION
File and storage containers of the lightweight, fiberboard type
which are now widely used in homes and offices are frequently
stacked on top of each other to provide a multiple compartment
storage assembly. When so stacked, some means must be employed to
hold the containers together as a unitary assembly. The stacking
devices now used for this purpose must often take the form of metal
strips or rims which are attached to the sidewalls of the
containers and are provided with locking or coupling means for
joining adjacent containers together. In addition to being
unsightly, stacking devices of this type are unduly expensive in
comparison with the low cost of the fiberboard containers with
which they are used. There is thus a need for a neat, attractive,
stacking device which is relatively inexpensive and which may be
selectively utilized to hold stacked, fiberboard containers
securely together. The stacking clip of the invention has been
designed with a view towards fulfilling that need.
BRIEF SUMMARY OF THE INVENTION
Our unique stacking device is particularly characterized by its
small size, attractive appearance, inexpensive construction and its
ability to be quickly and easily snapped into firm, locking
engagement with adjacent portions of two file or storage
containers.
These basic objectives have been realized by making an elongated
clip member from flexible plastic molded or extruded to provide
retention shoulders on the opposite ends thereof, and bowed along
its length to impart a spring action to the container-engaging
retention shoulders.
Our stacking device is preferably of T-shaped configuration with a
central, web section extending from the aforesaid elongated clip
member at right angles thereto, the web section being positioned
horizontally between two containers and having oppositely directed
retention shoulders which are secured to the abutting top and
bottom container walls through apertures therein.
As a particularly advantageous feature of our invention, we slit
the walls of the fiberboard containers at predetermined points to
provide small, flap-covered apertures; and angled extension tabs on
the ends of the aforesaid clip member and web section serve to
displace the flaps inwardly so that the retention shoulders may
engage the container walls. Raised beads on the retention shoulders
hold the stacking clip firmly in place.
These and other objects and advantages of our invention will become
readily apparent as the following description is read in
conjunction with the accompanying drawings wherein like reference
numerals have been used to refer to like elements throughout the
several views.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the improved stacking clip of this
invention;
FIG. 2 is an exploded, perspective view showing two file cases and
the manner in which a plurality of our clips may be positioned to
fasten the cases together;
FIG. 3 is a perspective view showing the two cases of FIG. 2
secured together with our stacking clips; and
FIG. 4 is a vertical cross section view taken along lines 4-4 of
FIG. 3.
The fastening device of this invention has been particularly
designed with a view towards joining together a plurality of
fiberboard file or storage cases to provide a unitary, multiple
compartment assembly. The fastening device is referred to
hereinafter as a stacking clip since it will most frequently be
used t hold together two or more file boxes which are stacked on
top of each other in a file cabinet type of assembly. However, as
will hereinafter appear, out unique fastening clip is equally
effective in joining together several file cases in a horizontal
arrangement.
Referring now to FIG. 1, it will be seen that our fastening device
preferably takes the form of a T-shaped clip generally indicated by
reference numeral 1. Clip 1 is comprised of an elongated
crossmember 2, and a central, web section 4 extending substantially
perpendicular thereto. Crossmember 2 is bowed to give it the
arcuate shape shown for a purpose hereinafter explained. On the
opposite ends of crossmember 2 are lock portions in the form of
inwardly extending shoulders 6 and 7 which engage the walls of
adjacent cases or file boxes through apertures therein. Lips or
raised beads 8 and 9 on the inside edge of shoulders 6 and 7 assist
in holding crossmember 2 to the walls of adjacent cases to be
joined together. The free end of web section 4 is also provided
with opposed shoulders 10 and 11 on the opposite sides thereof,
beads or lips 12 and 13 being formed on the edges of shoulders 10
and 11 respectively. For the purpose of displacing the fiberboard
covering precut apertures in the walls of the casings to be
assembled together, we provide extension tabs 14 and 15 on the
opposite ends of crossmember 2. Tab elements 16 and 17 on the
opposite sides of web section 4 serve a similar purpose. All of the
extension elements or tabs 14, 15, 16 and 17 are angled outwardly
so that they may function in a particular manner clearly set forth
below.
In FIG. 2 there are shown two storage boxes or cases 18 and 19 of
the corrugated fiberboard type with which clip 1 is expected to
find its widest use. Storage box or case 18 has top and bottom
walls 20 and 22 and sidewalls 24 and 26; and case 19 is similarly
constructed with top and bottom walls 21 and 23 and sidewalls 25
and 27. Casings 18 and 19 are preferably strengthened by U-shaped
liners or inserts 28 and 30 which cover the side and bottom walls
thereof. In order to prepare cases 18 and 19 for the attachment of
clips 1 thereto, they are provided with a plurality of precut
apertures in their side, bottom and top walls, these apertures
being shown at 32, 34, and 36 in case 18 and at 33 and 37 on lower
case or box 19. The front edge of the bottom panel of liner 28 for
case 18 has been cut away to show aperture 34 in its bottom wall
22. It is to be noted that the aforesaid apertures 32, 34, 36, 33
and 37 have been formed in the walls of cases 18 and 19 by cutting
U-shaped slits therein; thereby providing hinged cover flaps for
the apertures, several of these flaps being designated by reference
numerals 38 and 40 on case 18 and by numerals 39 and 41 on case 19.
Liners 28 and 30 have been provided with notched openings 42 and 44
in their bottom and side panels within which hinged aperture flaps
38, 39, 40 and 41 may be received when pushed or displaced
inwardly.
The side, top and bottom walls of storage case 18 terminate at
their forward edges in hingedly connected flaps 46 and 48 which
fold inwardly over the side and bottom panels of insert 28, two of
these flaps being shown turned outwardly in FIG. 1. Corresponding
flaps 47 and 49 on case 19 are shown in their inwardly turned,
fully assembled position in overlying relation to insert 30.
In order to join cases 18 and 19 together, a plurality of stacking
clips 1 are first attached to lower case 19 in the manner shown in
FIG. 2. Clips 1 are positioned with elongated crossmember 2
extending vertically and web section 4 lying horizontally on top
wall 21 of case 19. Retention shoulders 7 at the lower end of
crossmembers 2 are inserted in upper apertures 33 of sidewalls 25
and 27 of case 19. Lock or retention shoulders 11 on web section 4
are engaged within apertures 37 in top wall 21 of case 19. Upper
case 18 is then lowered from the exploded position shown in FIG. 2
to a position of rest directly on top of case 19 in alignment
therewith. Because of the arcuate or bowed shape of crossmembers 2
of clips 1, upper shoulder portions 6 will project inwardly over
top wall 21 of case 19. As case 18 is lowered into position, its
sidewalls 24 and 26 will engage retention shoulders 6 and bias the
upper ends of crossmembers 2 outwardly. As lower apertures 32 in
sidewalls 24 and 26 of case 18 come into alignment with shoulders
6, the upper ends of crossmembers 2 will spring inwardly thereby
snapping shoulders 6 into place in apertures 32. Also, as case 18
is lowered into place on top of case 19, upper shoulders 10 on web
sections 4 will be forced into apertures 34 in bottom wall 22 of
case 18.
FIG. 3 shows clips 1 holding cases 18 and 19 together as a unitary,
multiple compartment assembly. The manner in which clips 1 engage
the apertures in the walls of cases 18 and 19 and is held in place
therein appears most clearly in FIG. 4. As clips 1 are attached to
sidewalls 24, 26, 25 and 27 of cases 18 and 19, outwardly angling
end tabs 14 and 15 push cover flaps 38 and 39 inwardly to the
position shown in FIG. 4. The displacing of flaps 38 and 39 by
extension elements or tabs 14 and 15 permits shoulders 6 and 7 of
clips 1 to engage casing sidewalls 26 and 27 along the edges of
apertures 32 and 33 in the manner shown in FIG. 4. Lips or beads 8
and 9 on the inside edges of shoulders 6 and 7 grip the inside
surface of the casing sidewalls and assist in retaining clips 1
firmly in place. In a like manner, angled extension elements 16 and
17 on web section 4 displace hinged flaps 40 and 41 upwardly and
downwardly respectively to thereby permit locking shoulders 10 and
11 to be inserted through apertures 34 and 37 in abutting bottom
and top walls 22 and 21. Lips 12 and 13 on shoulders 10 and 11 bear
against the inside surface of walls 22 and 21 to hold web section 4
securely in place.
As may be clearly noted with respect to FIGS. 3 and 4, web section
4 of clips 1 is sandwiched between abutting walls 21 and 22 of
cases 18 and 19, and thus will be out of sight when the cases are
assembled in the manner shown in FIG. 3. It is possible that web
sections 4 could be eliminated with clips 1 being comprised only of
elongated members 2 having wall engaging lock means at the opposite
ends thereof. Such a clip would hold stacked cases 18 and 19
against relative vertical movement. However, the adjoining cases
would be more susceptible to lateral and lengthwise separation
without web section 4 locked into the casing top and bottom walls
in restraining engagement therewith.
The walls of cases 18 and 19 have been cut in the U-shaped manner
shown in order to provide cover flaps 38, 39, 40 and 41 which
substantially conceal the apertures when the file or storage cases
are being used as single units without clips 1. It would, of
course, be possible to simply punch or cut out open slots in the
walls of the casings; however, such apertures would be readily
visible when not engaged by stacking clips and would detract from
the appearance of the file cases. Cases 18 and 19 have been shown
stacked one on top of the other as this is the type of assembly in
which they will most frequently be used. However, a plurality of
casings could also be assembled in horizontal, side-by-side
relationship with web portion 4 of each clip 1 extending vertically
between the casing sidewalls and crossmember 2 lying horizontally
with its retention shoulders 6 and 7 engaging apertures in the
casing top walls.
Fastening clips 1 may be constructed from various metals and
plastic materials. It is necessary that the material of clips 1 be
relatively rigid but flexible enough to permit crossmember 2 to be
bent at its ends when attaching shoulder portions 6 and 7 to
apertures in casing walls. Clips 1 could be injection molded from
polypropylene or medium impact styrene. We have found it
particularly desirable to manufacture clips 1 from strips of vinyl
extruded to the proper shape and then cut to the desired clip
widths. Crossmember 2 and web section 4 are preferably on the order
of one inch in width.
* * * * *