US 2242684 A
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Description (OCR text may contain errors)
-May 20, 1941. K T ART 2,242,684
BAKING UTENSIL AND SIMILAR REGEPTACLES Filed June '7, 1937 Patented May 20, 1941 BAKING UTENSIL AND SIMILAR RECEPTACLES Kimberly Stuart, Neenah, Wis., assignor of onehalf to Elizabeth R. B. Stuart, Menasha, Wis.
Application June 7, 1937, Serial No. 146,899
' 9 Claims. (Cl. 229-25) The present invention relates to baking utensils and similar receptacles and more particularly to receptacles made of flat sheet material.
Although it has been previously proposed to manufacture receptacles. from sheet material such as calendered paper, they have not possessedsuflicient rigidity or wear resistant properties to adapt them to wide use. For instance, when such receptacles are used in the baking of pics they must possess sufiicient rigidity to withstand handling in automatic machines. Also they must have a neat peripheral edge and one that will not fray or split in use.
It is accordingly the primary object of this invention to provide a novel receptacle of sheet material and embodying means for rendering it rigid and durable.
Another object is to provide a receptacle of generally cup-shape embodying pleated sides and having novel means for firmly holding the pleats in closed position and simultaneously lending rigidity to the structure.
My invention also aims to provide a novel receptacle having pleats formed in a side wall and a flange thereof, the parts being so formed that the pleats in the flange lie substantially flat, or in the plane of the flange so as to impart to the latter the appearance of a single thickness flange.
Further objects will become apparent as the specification proceeds in connection with the annexed drawing, and from the appended claims.
In the drawing:
Figure l is a perspective view of a pie plate embodying one form of the invention.
Figure 2 is a fragmental sectional view through the plate of Figure 1 and is taken on the line 2-2 of Figure 3.
' Figure 3 is a fragmental top plan view of the plate shown in Figure l.
" Figure 4 is a fragmental top plan view of the plate illustrating another form of the invention and it shows the blank prior to bein folded.
Figure 5 is a view similar to Figure 4 but illustrates a further modification of the invention.
Figure 6 is a fragmental sectional view of the plate of Figure l but illustrates another form of means for holding the pleats in closed condition and is taken substantially on the line 6--6 of Figure 7.
Figure 7 is a fragmental top plan view of the plate shown in Figure 6.
Figure 8 is a view similar to Figure 6 but shows a further modified form of means for holding the pleats in closed position.
Figure 9 is a fragmental top plan view of the plate shown in Figure 8.
Figure 101s a perspective view of a deep receptacle embodying the invention.
Figure 11 is a perspective view of a rectangular receptacle embodying the invention, and
Figure 12 is a perspective view illustrating the manner in which the pan of Figure 11 isassembled.
With continued reference to the drawing, wherein like reference characters have been employed to designate like parts throughout. the several views thereof, and with particular reference to Figures 1, 2 and 3, I have by way of illustrating the invention shown a pie plate A having a bottom 10, a shaping side wall II and a flange I2.
Plate A is made of any suitable flexible material such as Kraft paper, laminatedpaper or laminated paper and metal foil, such as thin aluminum foil, the laminations being preferably secured together in full surface engagement by means of a casein or casein-latex adhesive. The paper may have a metal foil coating on one or both sides. When the paper is coated on both sides with foil it has been found that the plate will withstand baking temperatures without charring. Chemical fireproofing of the paper, which is necessary when' only one foil coating is used, is not needed.
Before dieing the plate into flnalform it is placed in a so-called saw-tooth die and preformed into a generally cup-shaped plate having serrations in its side wall.
The pre-formed plate is then placed between a pair of dies having the shape of the completed plate and pressure is applied, causing the serrations to fold flat' into closed pleats. As seen in Figure 1 the plate has a bottom wall I0, an inclined wall ll whose inner surface is substantially continuous, a flange 12. A plurality of pleats [3 are formed in the side wall II and flange i2. The pleats serve .the-dual purpose of taking up the surplus material in the dieing operation and of serving as markers or cutting guides for dividing the pie. In the present instance eight pleats are shown but the number construction. In these figures the blank for the a plate is shown as it appears prior to folding into final form.
In Figure 4 the plate is shown as having fold lines l6 and I1 formed in side wall Ha and [2a. When the pleat is formed it folds about line II as an axis down upon the upper surface of flange.
Ho and fold line l6 assumes the position indicated by dotted line I8. It is accordingly seen that the pleat is made up of three thicknesses of material and in some instances the lumps produced in the flange by the three thicknesses of material are objectionable. I have therefore provided a cut-out portion or rectangular recess IS in the flange opposite each pleat. As seen in Figure 4 recess 19 lies between fold lines l6 and II, with the result that when the pleat is formed it is of two thicknesses of material in the flange as compared with the triple thickness flange of the first form of the invention.
In Figure 5 the plate illustrated is very much like that just described with the exception of the recess in the flange. In this'form of the invention the flange llb is provided with recesses 2| which extend from fold line l6 to the position of that fold line in final position, indicated by the dotted line l3. Accordingly, when the pleat is in final folded position the pleat in the flange consists of but a single thickness of material, and the flange presents the appearance of being made of a single continuous piece of material.
The forms of plates of Figures 4 and'5 are particularly advantageous when the outer edge of the flange is turned downwardly upon itself to lock the pleats in closed position, or when certain other means are employed for the purpose.
In Figures 6 to 9, inclusive, I have illustrated flat metallic rings for holding the pleats in closed position and for simultaneously imparting rigidity to the finished structure.
Referring to Figures 6 and 7, plate A is illustrated as having a. flat, preferably thin metallic ring 23 mounted on flange l2 thereof. A plurality of teeth or prongs 24 are struck downwardly out of ring 23 leaving openings 25. As seen in Figure 6, teeth 24 pass through and are crimped over into tight engagement with the underside of flange l2.
Ring 23 may be stamped in endless circular form out of sheet metal stock or it may be formed of strip material and have the ends spot welded, crimped or otherwise secured together. The ring may be applied to the plate after it is finished, or if desired, and as described in connection with the stapled plate, suitable mechanism may be incorporated in the final die assembly for applying the ring and clenching the teeth after the dies have been brought into final position.
In Figures 8 and 9 a. slight modification is iilustrated. The plate shown is like that illustrated in Figures 6 and 7, the difference residing in the structure of ring 2341 associated with the flange. v
Ring 23a is provided with a downwardly turned edge 21 which embraces and protects the periphery of flange 12. Teeth or prongs 28 are'struck downwardly out of ring 2311 so as to leave openlugs 29. Teeth 28 pierce flange I2 and are clenched over against the underside of the flange. In this case the teeth extend circumferentially, whereas in Figures 6 and '1 they are directed radially.
In the forms of invention shown in Figures 6, 7, 8 and 9 if desired a second ring may be located on the underside of flange l2 and be provided with a plurality of slots through which the prongs may project, or if desired the two rings may be provided with other means for h9lding them in assembled relationship. For instance a ring may be located either side of the flange and tongues or other projections may be provided on one of the rings and turned or crimped over into engagement with the other ring.
The forms of the invention shown in Figures 6, 7, 8 and 9 may be applied to any of the plates shown or described and it has been described as being applied to plate A for sake of simplicity.
In Figure 10 I have illustrated a deep receptacle B, which may have plain or pleated side walls as having a ring 3| applied thereto. Ring 3| is preferably located inside the receptacle and is provided with integral teeth 32 which pierce the upper edge of the receptacle and are clenched over.
Ring 3| stiifens and protects the upper edge of the receptacle and when the latter is pleated it also serves the further purpose of locking the pleats in closed position.
In Figures 11 and 12 there is shown a rectangular receptacle 33 to which a toothed metallic strip 34 has been applied. Strip 3! cooperates with the upper edge of receptacle 33 to stiifen and protect the latter. As shown in Figure 12 the blank is folded to provide a pair of flaps 35 at each end of the receptacle which are folded in and locked in place by strip 34.
I have illustrated receptacles in which definite or predetermined pleats are formed but it is to be understood that the various forms of securing means of the invention are equally applicable to receptacles wherein'random pleats are formed, for instance by plain drawing in a die assembly.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
What is claimed and desired to be secured by United States Letters Patent is:
1. In a receptacle formed of sheet material and having upwardly extending sides in which folds ,or pleats are formed to take up the surplus material during the forming of the receptacle, a flat rigid strip extending along the periphery of said receptacle for stifiening and re-enforcing said receptacle and for holding said pleats or folds in closed position, said strip having a plurality of integral prongs which pierce said material and are1 turned over to lodk said strip to said receptac e.
2. In a receptacle formed of sheet material, said receptacle having a bottom, an inclined pleated side wall terminating in an outwardly extending flange, a substantially flat rigid reenforcing ring member lying in full surface engagement with one side of said flange only and extending to the periphery thereof, and means for locking said ring member in position on said flange comprising a plurality of teeth integrally formed in said ring member and piercing said flange and clenched over on the other side of said flange.
3. The receptacle described in claim 2, wherein said ring member is disposed on the upper side of said flange and is provided with a down-turned outer peripheral edge which circumscribes and protects the peripheral edge of said flange.
4. In a receptacle formed from a single blank of bendable material; a bottom wall; an upwardly extending side wall terminating in a peripheral flange, said side wall being formed with a plurality of'pleats which are folded and pressed flat against the outer surface of said receptacle and said blank being provided with peripheral notches where each pleat is to be formed, to provide substantially uniform thickness of said flange; and a flat relatively rigid flange reenforcing and pleat locking rim secured along the upper surface of said flange.
5. In the receptacle defined in claim 4, integral prongs extending from said rim through said flange to be there turned over for attaching the rim to the flange and locking the pleats in closed position.
6. In a receptacle formed from a sheet of bendable material and having a bottom wall, side walls and a peripheral flange; pleats extending from said bottom wall upwardly along said side walls' and across said flange to take up excess material, said pleats being folded and bent against the outer surfaceof said receptacle so as to provide a substantially continuous inner surface onsaid side walls and along the top of said flange; a relatively rigid rim made of material harder than said receptacle extending alongthe upper surface of said flange; and integral prongs extending from said rim through said flange and bent over to attach said rim to said flange and lock said pleats in closed position.
'7. In combination, a receptacle formed from a single blank and having a bottom wall, an upwardly extending side wall and an outwardly directed peripheral flange and pleats representing excess material resulting from formation of said receptacle, said blank being formed in association with said pleats with generally radial peripheral notches whose opposite side edges are disposed adjacent each other when said receptacle is formed so as to provide a substantially continuous flange of uniform thickness; and a flat reenforcing rim lying along the upper surface of said flange and locked thereto.
8. In a receptacle formed from a sheet of bendable material and having a bottom wall, side walls and a peripheral flange; pleats extending from said bottom wall upw'ardly'along said side walls and across said flange to take up excess material, said pleats being folded and bent against the outer surface of said receptacle so as to provide a substantially continuous inner surface on said side walls and along the top of said flange; a flat metal rim band overlying the upper surface of said flange; and integral prongs extending from said :band through said flange and bent over to attach said band to said flange and lock said pleats in closed position.
9. In combination, a receptacle formed from a single blank and having a bottom wall, an upwardly extending side wall and an outwardly directed peripheral flange on said side wall, said blank being provided with pleat-defining fold lines extending outwardly from said bottom wall 1 and having material removed at spaced portions along its periphery to provide generally radial notches at the outer ends of said pleats, and said pleats representing excess blank material and said notches extending substantially entirely across said flange whereby a substantially continuous flange of desired uniformity of thickness is provided when the receptacle isformed; and a stiff flange-reinforcing and a pleat-locking rim secured along the entire periphery of said flange.