US2050206A - Molded pulp article - Google Patents

Description

Afi 4, 1936. M. P. C'WAPLl-N 2,050,206

MOLDED PULI-T ARTICLE Filed Dec. 21, 1954 2 SheetsSheet 1 M/vEA/mk Her/e P Chap/M ATTORN mum Aug. 4, 1930. M. P. CHAPLIN 2,050,206

MOLDED PULP ARTICLE Fi led Dec. 21, 1954 2 Sheets-Sheet 2 Patented Aug. 4, d 1936 PATENT OFFICE 050,206 MOLDED PULP ARTICLE Merle P. Chaplin; Waterville', Maine, assignor, by

mesne assignments, to The Canal National Bank of Portland, as trustee, Portland, Maine Application December 21, 1934. Serial No. 758,645

' Claims. (01. 229-25) This invention relates to an article in the form of a plate or dish made of paper pulp preferably by a method of manufacture consisting of molding it directly from a liquid pulp mixture into the 5 desired shape and form.

In my prior Patents Nos. 1,748,865. and 1,748,911 I disclosed 'a plate made of fibrous materials which was circular in design and possessed certain characteristics which made it adequate for the purpose then intended.

My present invention has to do with an im proved article which provides a greater space for the food placed in the plate or dish, provides an article of greater mechanical strength and i5 rigidity and is more attractive in design and appearance.

Other objects of the invention are apparent from the following description and drawings.

Fig. 1 is a top view of one of my designs.

20 Fig. 2 is a sectional view onv line 2-2, Fig. -1.

Fig. 3 is a top view of a modified design of my article.

Fig. 4 is an enlarged sectional view through the plan channel rim section.

25 Fig. 5 is an enlarged sectional view through the channel rim section with the addition of a reinforced edge section.

In my two prior designs above referred to I provided a plain channel rim section or'a channel rim 30 section plus a reinforced edge section which was circular in shape. In other words the flanges of the channel section are curved and one is con-.

siderably longer than the other. While this chan nel rim section provided a much stronger article 45 relatively flat portions 4 which correspond to the web of a common channel section, and the sections 5 and 6 which correspond to flanges of a common channel section. It will be observed that the rim sections 2 are composed of four relative- 50 ly long straight portions and four relatively short curved portions which join the ends of the straight portions so that the plate or dish may be completely enclosed. While my preferred form of design shows four 55 relatively long straight sections of channel shape curved slightly inwardly. This slight inward I may without departing from the scope of my invention provide a greater number of straight sections such as six or eight. These may be connected together by curved channel, sections shorter than those shown on either Figs. 1 or 3 or 5 be joined directly together without the use of a curved section. I

In Fig. 3 I show a modified design in which the four channel rim sections are shown to be 0 curve does not detract materially from the full utilization of the channel section design 'as regards strength and rigidity but actually acts to offset any tendency oftipping or twisting these channel sections due to their being connected together at right-angles at their ends by the short curved sections. It also provides an article of somewhat more attractive appearance than that disclosed in Fig. 1.

By providing a substantial part of the rim section of my article of substantially straight sections and connecting these with short curved sections having a relatively small radii I not ,only utilize the maximum mechanical advantage and strength of a channel section but also secure a maximum of article capacity in proportion to the size of the article and the paper pulp materials used therein.

It will be noted that. in Figs. 2 and 4 I show a reinforced edge section similar to that disclosed in my prior Patent 1,748,911.

Also I show in Fig. 5 a plain channel flange section without edge reinforcement as disclosed in my prior Patent No. 1,748,865.

I do not limit myself to the use of either the plain channel rim section or the channel rim section with the addition of the reinforced edge I section in either of the designs shown in Figs. 1 or 3. These two types of sections may be used with either of the above designs as best suits the purpose intended.

in my prior designs where the rim section was curved at all points. i

What I desire to claim by Letters Patent is:- 1. An article of the class described having a bottom portion, relatively flat, a rim channelshaped in cross-section, said section comprising a web and two' angle portions, said rim consisting of a plurality of relatively straight portions integral with a plurality of curved portions.

2. An article of the class described having a bottom portion relatively flat and substantially square in outline and an enclosing rim portion integral with the bottom portion and channelshaped in cross-section, said section comprising a web and two angle portions, and said web portion being inclined inwardly towards said flat portion.

3. An article of the class described having a substantially flat bottom, a plurality of inwardly curved channel-shaped rim portions and a plurality oi outwardly curved channel-shaped rim portions, each of said rim portions in section comprising a web and two angle portions.

4. An article of the class described having a relatively flat bottom substantially square in outline with slightly rounded corners, an enclosing rim portion integral with said bottom portion MERLE P. CHAPLIN.

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