|Publication number||US2524162 A|
|Publication date||Oct 3, 1950|
|Filing date||Feb 27, 1945|
|Priority date||Feb 27, 1945|
|Publication number||US 2524162 A, US 2524162A, US-A-2524162, US2524162 A, US2524162A|
|Inventors||Alfred Chavannes Marc, Rohdin Howard A|
|Original Assignee||Alfred Chavannes Marc, Rohdin Howard A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (9), Referenced by (54), Classifications (20)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Oct- 3, 1950 M. A. cHAvANNEs ET AL 2,524,162
DESICCANT PACKAGING Filed Feb. 27, 1945 jwua/wbo/m, HOWARD Af ROHDIN MARC A. CHAVANN ES FIG. 2
Patented. Oct. 3, 1950 UNITED `STATES PATENT OFFICE DESICCANT PACKAGING Marc Alfred Chavannes, Lisbon, Conn., and
Howard A. Rohdin, Glen Ridge, N. J.
Application February 27, 1945, serial No. 579,986
(ci. x12- 31) 3 Claims.
Itis an object of this invention to provide 'an improved package and an improved method of packaging whereby goods or material may be stored for long periods with complete protection against the ingress of moisture either in the form of water or its vapor.
It is a further object of this invention to provide a package which may be easily inspected to determine 'the extent of moisture penetration, and which may be easily resealed after such inspection.
The above and other objects will be made clear from the following detailed description, taken in connection with the annexed drawings in which:
Figure 1A is a perspective view partly in section of one form of improved package, and
Fig. 2 is a view similar to Fig. 1, of an alternative `form of package.
It is well known that there is no s uch thing as absolutely Vimpervious material, and there is therefore no known package, the walls vof which absolutely will not transmit any moisture vapor. Heretofore it has been common practice to seal such objects as airplane engines, gun mounts, and other highly finished parts in a wrapper or envelope, the vmaterial of which olers good re` sistance to the passage of moist`ure vapor, and to seal within the package a suitable desiccant such, for example, as sili'ca-geljcalciumchloride, or activated carbon. The machine parts are protected against moisture until the desiccant has become saturated. Various means are used to pro-vide visual indication of saturation of the desiccant. These usually involve mixing with the desiccant a suitable anhydrous acid or alkali, together with an anhydrous indicator. As moisture accumulates in the desiccant the acid or alkali is activated to affect the indicator, whereby to bring about a change of color, providing a visual indication that the saturation point has been reached. Y
The materials used for forming packages for thisY purpose are necessarily rugged and opaque, and it is therefore impossible to observe the indicator through such material. Theoretically, a window structure could be devised which would permit inspection. The provision of a window, however, decreases the total resistance of the package to moisture vapor penetration, and moreover, contributes an area of mechanical weakness which is detrimental in handling and shipping the packages.
The fundamental principle of this invention lies in vproviding a duplex package inwhich a desiccant is completely sealed, along with the envelope. A second wrapper is sealed completely around the rst wrapper, and a second body of desiccant is placed between the wrappers. Supercially this appears to be a mere multiplication of parts. In practice, however, it results in protecting the interior ofv the inner wrapper from ingress of moisture vapor and of preventing such ingress for tremendous periods of time. The best sheet materials available for this purpose have a moisture vapor transmission rate slightly under .025 gram of water per hundred square inches per twenty-four hoursvr at 100v degrees Fahrenheit, and with a relative-humidity on the "wet side of per cent; This may seem low, but when it is considered that the total area of the package may easily exceed four thousand times square inches, it is clear that moisture penetration at the total rate of '100 grams every twenty-four hours is a serious factor. Under present practice any reasonable quantity of desiccant may become saturated within about two months; therefore within this time the package must be opened, the desiccant inspected, and perhaps replaced. If for any reason (and there are many reasons) the moisture transmission rate increases, 'there is the distinct possibility that the desiccant will become saturated prior to the regular inspection date, whereupon damage to the'machine parts will ensue.
In the interests of brevity, materials of the character referred to above, which have excellent, but not, of course, perfect resistance to moisture vapor penetration, are characterized herein as unavoidably pervious materials. An example of such a material which is common in the industry comprises a lamination of heat'sealable vinyl resin with an intermediate layer of metallic foil, and an outer layer of scrim. NumerousY other materials having the characteristics Vnoted above may, of course,A be used.
Y inner envelope is so small as to become negligible.
within the inner carton while a second body of desiccant 46 is contained between the inner surface of the outer carton 38 and the outer surface of the inner wrapper 34. Suitable spacers 4B are provided to separate the inner wrapper 34 from the outer carton 38. This is done to facilitate circulation of air and thus to assure uniformity of humidity conditions throughout the space of inner and outer packages. The packages of desiccant 44 and 46 are treated exactly like packages 2U and 22 discussed above in connection with f Fig. 1.
mined, and which probably will not be workedr out for many years to come. Qualitatively, however, there is an abundance of observed data to demonstrate that when the temperature, and especially the humidity, on the high side are low in absolute terms, the rate of transmission is negligible. As a matter of fact, in the testing process, it is necessary to establish the humidity differential between the two sides of the test specimen as high as'the diiierence between one or two per cent on the `low side and ninety-five to ninety-six per cent on the high sidein order to obtain measureable results within 100 hours on a specimen of reasonable size. The decrease in transmission rate Awith decreasing temperature humidity on the high side is far more severe than a' straight line relationship, closely approa-ching Zero per unit of area per unit of time, atlo-w differential, when the high side is low in absolute terms.
In fact, there canbe` imperceptible penetration of moisture through the inner envelope until several weeks after the desiccant between the envelopes has become saturated. This means first, that a longer interval can be allowed between inspections, and second, that, for such greatly increased periods of time, the above m'entioned unpredictable increases in the Vrate of penetration through the outer envelo-pe, under no circumstances', can bringabout the saturation of the desiccant within the inner envelope with consequent damage to the machine parts.
It is still true that from vtime to time the outer envelope must be opened and the outer desiccant inspected and'replaced, but it will not be necessary to open the inner envelope oftener than once in a number of years andthen only as a precautionary measure. In short, so far as protection of the contents is concerned, the present invention do-es not, by doubling the number of walls, merely halve the moisture transmission rate. The number of walls is doubled, but thereby the moisture transmission rate is divided by many times'two. 1
Referring now to Fig. 1, there is shown a commodity lil'surrounded by inner wrapper I2 which in turn is surrounded by an outer wrapper I4. The inner wrapper I2 is hermetically sealed at I5 and the outer wrapper I4'is hermetically sealed 'at i8. A quantity of desiccant 2D is packaged withinthe inner wrapper I2 and another package of desiccant 22 is placed between the wrappers I2 and I4.
In Fig. 2 the arrangement is somewhat different. Here, commodity 301 is contained within a relatively rigid carton 32 formed of cardboard, fibre board or, perhaps, corrugated board. A wrapper 34 of substantially impervious material surrounds the carton 32 and' is hermetically sealed at 35. A second carton 3&3 surrounds the carton 32 and its wrapper 34, while a second wrapper 40 surrounds the carton' 38 and is hermetically sealed at 42. A body of desiccant 44 is contained Each of the quantities of desiccant 20 and 22 (Fig. 1) and 44 and 45 (Fig. 2) is packaged in a bag or wrapper formed of material which is relatively pervious to the transmission of water vapor but relatively impervious to the passage of liquid water. The desiccant, therefore, is enabled to function for the purpose of absorbing water vapor but, as the water accumulates in liquid form in the desiccant, the individual bag or wrapper containing the desiccant tends to prevent liquid water coming in contact either with the commodity or with the adjacent package walls.
There are many materials which are relatively pervious to moisture in the form of vapor, but which are relatively impervious to the passage of water in liquid form; For example, most of the vinylresin lmsehave relatively poor resistance to the passage of moisture vapor, but have excellent resistance to the passage of liquid water. Asa practical matter, however, paper of the high wet strengthV type will-usually be best for this service, since such paper if otherwise untreated offers very low resistance to the vapor, but offers high resistancel tothepassage Vof the liquid. p
It is a vfact that-the apparent moisture vapor transmission rate ofv a given packaging lm increasesxenormously if thereis any actual liquid waterin Contact with eii ,her` surface. This occurs for the reason that any l.packaging material will have a certain quantity, however small, of soluble material. `Liquid water inv Contact with such wrapping material dissolves a portion Aof the soluble matter. Osmosis then immediately takes place, bringing about a passage of the liquid itself. It is, therefore, important to avoid, so far as'possible, any contact of liquid water with the walls of the package. Once in place, there is no functional and Very little structural difference between abag and a wrapper. A bag may, therefore, be regarded as 'a lpartially .preformed and presealed wrapper.
For convenience the term wrapper is used herein, but such term is intended to include bags. The packages illustrated in the drawings have been somewhat idealized and in practice there usually will not be the regularity of form illus trated. Moreover, when the packages are very large, the wrapper will be formed by joining a number of sheets by means of hermetic seals or seams, which may-be of any suitabletypeybut which preferablyshould be made in accordance with the co-pending application ofV Howard A. Rohdin, Serial No. 561,982, -flledfNovember 4, 1944, which has now become. abandoned. The use of spacers between the inner and outer package has been illustrated in connection withv the carton structure of, Fig. 2. It is equally applicable to the wrapper structure of Fig. l, but in practice, where the object is irregular and no carton support is provided, the spacer idea is somewhat more difficult of application.
What is claimed is:- I 1. A' package comprising: a commodity;l an
unavoidably pervious sheet of material wrapped about said commodity and sealed by substantially impervious seals; a quantity of desiccant material enclosed in said wrapper with said commodity; a second wrapper of unavoidably lpervious sheet material surrounding said rst wrapper and sealed by substantially impervious seals; and a quantity of desiccant material enclosed between said rst and second wrappers each of said quantities of desiccant material being wrapped in a material substantially pervious to moisture vapor and substantially impervious to liquid water.
2. A package comprising: a commodity and a quantity of desiccant material enclosed in a substantially rigid carton; a wrapper of unavoidably pervious sheet material sealed by substantially impervious seals around said carto-n; a second carton surrounding said rst carton and its wrapper; and a second wrapper sealed around said second carton; there being a quantity of desiccant material between said second carton and said rst wrapper, each of said quantities of desccant material being wrapped in a material substantially pervious to moisture Vapor and substantially impervious to liquid water.
3. A package comprising: a commodity and a quantity of desiccant material enclosed in a subpervious sheet material sealed by substantially impervious seals around said carton; a second carton surrounding said first carton and its wrapper; and a second wrapper sealed around said second carton; there being a quantity of desiccant material between said second carton and said first wrapper, said second carton being spaced from said first wrapper to provide air circulation therebetween, each of said quantities of desiccant material being wrapped in a material substan tially pervious to moisture vapor and substantially impervious to liquid Water.
VMARC ALFRED CHAVANNES.
HOWARD A. ROHDIN.l
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1037218 *||May 20, 1911||Sep 3, 1912||Clarence H Dirnberger||Method of wrapping merchandise or the like.|
|US1222656 *||Aug 25, 1916||Apr 17, 1917||Aridor Company||Means for preserving prepared cereal, cereal products, and the like.|
|US1532831 *||May 17, 1922||Apr 7, 1925||Marion G Mastin||Preserving and packing of foods|
|US1657272 *||May 26, 1926||Jan 24, 1928||of rochester|
|US1964795 *||Jan 16, 1931||Jul 3, 1934||Aluminum Co Of America||Refrigerating unit|
|US2080066 *||Oct 31, 1933||May 11, 1937||Eastman Kodak Co||Film preserving package|
|US2196021 *||Dec 29, 1937||Apr 2, 1940||United Drug Company||Desiccating device|
|US2283867 *||Dec 19, 1939||May 19, 1942||Stokes Machine Co||Packaging and preserving dried biologicals, pharmaceuticals, and the like|
|USRE654 *||Feb 1, 1859||Improvement in devices for putting up caustic alkalies|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2771333 *||Oct 16, 1951||Nov 20, 1956||Phillips Petroleum Co||Container for deliquescent materials|
|US2897641 *||Apr 27, 1956||Aug 4, 1959||Lockheed Aircraft Corp||Packaging methods|
|US3063767 *||Aug 30, 1960||Nov 13, 1962||Gen Refractories Co||Brick package|
|US3084984 *||Aug 26, 1960||Apr 9, 1963||Crown Zellerbach Corp||Moisture resistant container|
|US3093242 *||Jul 10, 1961||Jun 11, 1963||Aseptic Thermo Indicator Compa||Packaged article for ethylene oxide sterilization and subsequent storage|
|US3128135 *||May 29, 1962||Apr 7, 1964||Anaconda Wire & Cable Co||Moisture-free package|
|US3266170 *||Feb 6, 1964||Aug 16, 1966||Heinicke Instr Co||Hardware and shipping container|
|US3516567 *||Jun 20, 1968||Jun 23, 1970||Grace W R & Co||Spaced wall container with desiccant spacer ring between walls|
|US4079152 *||Dec 9, 1976||Mar 14, 1978||Karakian Bedrosian||Controlled atmosphere tomato package|
|US4412617 *||Jul 20, 1981||Nov 1, 1983||Ethicon, Inc.||Ligating clip package|
|US4423080 *||Mar 6, 1978||Dec 27, 1983||Bedrosian And Associates||Controlled atmosphere produce package|
|US4459793 *||Jun 4, 1982||Jul 17, 1984||National Can Corporation||Composite container construction|
|US4528228 *||Oct 11, 1983||Jul 9, 1985||Michelsen Packaging Company||Atmosphere control cushioning pad|
|US4552767 *||Sep 27, 1984||Nov 12, 1985||General Foods Corporation||Method of packaging coffee with carbon dioxide sorbent|
|US4648509 *||Jul 14, 1986||Mar 10, 1987||Alves Dario M||Tamper-proof package and method|
|US4674630 *||Jan 17, 1986||Jun 23, 1987||Kirck George T||Reed case|
|US4681218 *||Mar 15, 1982||Jul 21, 1987||Becton, Dickinson And Company||Moisture-controlled glass microscope slide package|
|US4736707 *||Mar 9, 1987||Apr 12, 1988||Christie James M||Pet transport box and insert therefor|
|US4807743 *||Oct 29, 1987||Feb 28, 1989||Nippon Sheet Glass Co., Ltd.||Ware for flat glass preservation|
|US4813791 *||Sep 18, 1987||Mar 21, 1989||Multiform Desiccants, Inc.||Bag with integral material treating packets|
|US4998400 *||Jun 13, 1989||Mar 12, 1991||Material Engineering Technology Laboratory, Incorporated||Medical fluid-filled plastic container and methods of making same|
|US5111640 *||Aug 28, 1990||May 12, 1992||Mitsui Toatsu Chemicals, Inc.||Packaging container and packaging method of acrylamide crystal|
|US5114003 *||Mar 28, 1991||May 19, 1992||E. I. Du Pont De Nemours And Company||Tablet vial with desiccant in bottom|
|US5230350 *||May 29, 1991||Jul 27, 1993||Tabex Industries, Inc.||Moisture barrier for indwelling catheters and the like|
|US5353925 *||Jun 28, 1993||Oct 11, 1994||Christopher K. Lennen||Preservation method and device for a collectable article|
|US5447011 *||Oct 4, 1993||Sep 5, 1995||Kabi Pharmacia Gmbh||Product with reduced H2 S content and a process of making the same|
|US5557882 *||May 11, 1995||Sep 24, 1996||Southpac Trust International, Inc.||Plant package having a waxy wrapper|
|US5584162 *||May 11, 1995||Dec 17, 1996||Southpac Trust International, Inc.||Method of wrapping a floral product|
|US5636493 *||Jun 6, 1995||Jun 10, 1997||Southpac Trust International, Inc.||Method and apparatus for wrapping a floral grouping with multiple sheet wrapper|
|US5651232 *||May 11, 1995||Jul 29, 1997||Southpac Trust International, Inc.||Method of wrapping a floral product|
|US5653089 *||Jun 2, 1995||Aug 5, 1997||Southpac Trust International, Inc.||Method and apparatus for wrapping a floral grouping with multiple sheet wrapper|
|US5661950 *||May 11, 1995||Sep 2, 1997||Southpac Trust International, Inc.||Method of wrapping a floral grouping|
|US5740655 *||May 28, 1997||Apr 21, 1998||Southpac Trust International, Inc.||Method of wrapping a floral grouping|
|US5782057 *||Apr 21, 1997||Jul 21, 1998||Southpac Trust International, Inc.||Method and apparatus for wrapping a floral grouping with multiple sheet wrapper|
|US5816021 *||Apr 22, 1997||Oct 6, 1998||Southpac Trust International, Inc.||Method and apparatus for wrapping a floral grouping with multiple sheet wrapper|
|US6052968 *||Mar 10, 1998||Apr 25, 2000||Southpac Trust Int'l, Inc.||Method of wrapping a floral grouping|
|US6401432 *||Mar 20, 2000||Jun 11, 2002||Tosoh Corporation||Method for packing and sealing a zeolite adsorbent with a dehydrating agent|
|US6523329 *||Mar 22, 2002||Feb 25, 2003||Tosoh Corporation||Method for packing and sealing a zeolite adsorbent with a dehydrating agent|
|US6591582||Feb 12, 2002||Jul 15, 2003||Southpac Trust International, Inc.||Method of wrapping a floral grouping|
|US7828150||Jun 5, 2001||Nov 9, 2010||Glaxosmithkline Llc||Container for medicament powder|
|US9409693 *||Apr 30, 2014||Aug 9, 2016||Au Optronics Corporation||Carton|
|US9428317 *||Aug 15, 2012||Aug 30, 2016||Merck Patent Gmbh||Package for a product with at least one hygroscopic pourable solid|
|US20030140923 *||Jun 5, 2001||Jul 31, 2003||Taylor Anthony James||Container for medicament powder|
|US20030200724 *||Apr 2, 2003||Oct 30, 2003||Weder Donald E.||Method of wrapping a floral grouping|
|US20100140116 *||Jan 29, 2008||Jun 10, 2010||Matthias Stiene||Resealable container for storing moisture sensitive test elements|
|US20130193007 *||Jan 27, 2013||Aug 1, 2013||Honeywell International Inc.||Packaging and methods of packaging particulate solids|
|US20140021074 *||Aug 15, 2012||Jan 23, 2014||Merck Patent Gmbh||Package for a product with at least one hygroscopic pourable solid|
|US20140326621 *||Apr 30, 2014||Nov 6, 2014||Au Optronics Corporation||Carton|
|US20150239637 *||Jul 5, 2013||Aug 27, 2015||Merck Patent Gmbh||Packaging for a product comprising at least one hygroscopic flowable solid|
|DE2808358A1 *||Feb 27, 1978||Sep 6, 1979||Bedrosian & Ass||Controlled atmosphere tomato package - contg. desiccant packet and carbon di:oxide absorbent and comprising gas-permeable packaging film pref. low density polyethylene|
|EP0526519A1 *||Apr 19, 1991||Feb 10, 1993||Commonwealth Scientific And Industrial Research Organisation||Condensation control in horticultural packaging|
|EP0526519A4 *||Apr 19, 1991||Feb 17, 1993||Commonwealth Scientific & Industrial Research Organisation ( C.S.I.R.O. )||Condensation control in horticultural packaging|
|WO1992021394A1 *||May 20, 1992||Dec 10, 1992||Tabex Industries, Inc.||Moisture barrier for indwelling catheters and the like|
|WO1993018987A1 *||Mar 23, 1993||Sep 30, 1993||Pedrin Christopher K||Preservation method and device for a collectable article|
|U.S. Classification||312/31, 426/124, 53/449, 206/204, 383/113|
|International Classification||A23L3/3418, B65D75/38, B65D81/26, B65D77/00, A23L3/34, B65D6/00, B65D6/14|
|Cooperative Classification||B65D75/38, B65D77/003, A23L3/3418, B65D81/266|
|European Classification||B65D77/00B, B65D81/26F, B65D75/38, A23L3/3418|