US1197994A - Process for manufacture of liquid-containers. - Google Patents

Description

'APPLICATION FILED SEPT. I, $915.

INVENTOR A TTR/VEY B. ALLAIN.

PROCESS FOR MANUFACTURE OF LIQUID CONTAINERS.

APPLlCATlON FILED SEPT. 1. 1915.

1,19%9941 Patentedgept. 12,111111.

2 SHEETS-SHEET 2.

A TTOR/VE Y LOUIS B. ALLAIN, OF SEATTLE, WASHINGTON.

PROCESS FOR MANUFACTURE OF LIQUID-CONTAINERS.

Application filed September 1, 1915.

To all whom it may concern Be it known that I, LOUIS B. ALLAIN, a citizen of the United States, residing at Seattle, in the county of King and State of \Vashington, have invented certain new and useful Improvements in Processes for Manufacture of Liquid-Containers, of which the following is a specification.

The object of this invention is to improve the art or manufacture of liquid containers from fibrous material, such as paper pulp and produce the same with transparent or translucent Wall portions to enable the con tents to be observed.

Apparatus for accomplishing the above referred to operation is illustrated in the accompanying drawings in which- Figure 1 is a transverse vertical section of apparatus whereby my invention may be effected. Fig. 2 is a. horizontal section taken substantially through 2-2 of Fig. 1. Fig. 3 is a front elevational view of a container in the form of a milk bottle such as may be produced in accordance with the present invention. Fig. 4 is a vertical transverse sectional view of the same. Fig. 5 is a detail sectional view through 55 of 'Fig. 4:. Fig. 6 is a view similar to Fig. 5 to illustrate a slight modification. Fig. 7 is a fragmentary perspective view of one of the members of the mold shown in Figs. 1 and 2.

The receptacle produced by the present invention is in the nature of a milk bottle, Figs. 3 and 21, having its body composed of a peripheral wall A of paper pulp with an opening B therein closed by a sheet C of transparent or semi-transparent material which is introduced into and has its edges embedded in the surrounding plastic pulp material while the bottle Wall portion is being produced. Such wall is furthermore formed with a rabbet D in the mouth and circumferential groove E near the lower end for the reception of the bottom F which is inserted after the body has been removed from the molding machine.

Referring particularly to Figs. 1 and 2, 10 and 10 represent mold members having concave inner faces 11 (Fig. 7) and parallel side faces 12. These members are fitted between a cap plate 13 and a base plate formed of separable elements 14 and 14 Said mold members are guided for movements radially of the mold axis by rods 15 which slide in ti guides 15 provided on the machine frame.

The inner faces 11 of said members are cor- ,Specification of Letters Patent.

Serial No. 48,421.

rugated by providing the same with substantially vertical grooves 11 and having attached thereto a sheet 16 (Fig. 7) of fine wire gauze or an equivalent through which the liquid portion of the pulp' is forced to escape by the grooves 11 when the pulp material is subjected to pressure.

Intermediate the adjacent mold members are guide or wall members 17 having their sides. 17? arranged in angular relations and in planes parallel to the faces 12 in proximity thereto of said mold members. Like the latter, said Wall members are constrained to be moved in radial directions by rods 18 movable in guides 18 on the frame. Two of said wall members at diametrically opposite sides of the mold are fixedly secured to or formed integral with the respective elements 14 and 14 the inner faces of which are provided with semi-circular openings of a size to accommodate the core to be presently described. Said mold and wall members are caused to be moved radially toward and from the center of the mold by means such as fingers 19 and 20 of the members engaging in cam slots 19 and 20 of a disk 21 which is journaled on a bearing 22 of the machine frame. As shown, this disk is given reciprocatory rotary motion by means of a connecting rod 21 from a crank wheel 23 mounted on a shaft .23 which is driven by bevel gears 23 24 and 25 from shaft 25 which, in turn, is driven by bevel gears 25 and 26 from a power driven shaft 26.

The core of the mold comprises two arouate members 27 having angular shaped in ner faces 27 as shown in Fig. 2, and two members 28 and 29 having angularlydisposed side faces which are juxtaposed with the faces 27 of the other core "members. The member 28'has an arcuate outer face 28 which is arranged to be coextensive with the outer peripheral surface of the members 27 when the core is in operative condition. The other member 29 has its upper and lower portions, indicated by 29 similarly arranged, but intermediate thereof is an'offset face 29 which protrudes outside of the periphery of the remainder of the'core when in operative position. Opposing the core face29 is a hollow block 30 which is movable within a chamber 10 of the mold member 10 and yieldingly held in its outer position relative to said member by a spring 31.

The face 30 which is opposite the core face 29 is provided with perforations 30 Patented Sept. 12, 1916.

10 represents a pin extending into a slot 30 of the block 30 to limit the travel of the latter with respect to the member 10 Said core members are Supported upon a crosshead 32 and are held thereupon by headed bolts 33 which respectively pass through slots 33 provided in the feet 33 of the members. The core members are caused to move radially in and from the mold center through the agency of toggle links 34 connecting the respective members with an upright rod 34 which is axially movable through a bore provided in the cross-head 32.

The raising and lowering, as well as the expansion and contraction of the core, are regulated and effected from the shaft 26 by a cam 37, which has two cam-slots, in one of which, 37 there operates a roller, 32 which is attached to the cross-head 32 and in the other cam slot 37 operates a roller 35 which is attachedto the rod 34 These cam slots are respectively shaped so that in one portion of their revolution, the cross-head 32 and the rod 34 are lowered simultaneously but that somewhere during their downward motion the ratio of travel of the rod 34 is temporarily augmented sufficiently to contract the core, .When they again travel simultaneously to their lowest positions. In their upward movements the cross-head 32 and the rod 34 travel simultaneously except that prior to the mold being charged the ratio of travel of the rod 34 is augmented sufficiently to entirely'expand the core, or this expansion of the core may be only enough at this time tobring the face of the core member 29 outside of the core members 27 and by a supplemental travel of the rod 34 the expansion of the core be completed as the mold is contracted.

Above the mold are two cylinders 38 and 38 arranged concentrically about the axis of the mold to provide an annular chamber 39 for a similar shaped plunger 40 which is given vertical reciprocatory motion by a yoke connection 41 with the arm 42 of a lever whose other arm 42 is connected by a pitman 43 with a crank-wheel 44 on a stub shaft 44 which is rotated by means of gears 44 and 23 from the aforesaid shaft '23. The outer of said cylinders has an opening communicating with a feed pipe 45 through which the material is supplied to the mold. Included in said pipe ,is a gate valve 46 which is connected to the lever arm 42 so that it is opened and closed as the plunger 40 is actuated by the other arm of the lever to shut or expose the opening into said pipe. By such devices and the proper spacing of the valve 46 from the plunger, it is evident that a predetermined charge of pulp may be supplied into the chamber 39 and thence into the mold cavity below in each cycle of the operation. Besides acting as a valve, said plunger is formed at its lower end with a depending circular rib 40 to serve as a coping element for forming the rim and rabbet of the bottle mouth.

In superposed relation with the mold member 10 is a receptacle 47 for sheets 48 of transparent or semi-transparent material such, for example, as paraflined paper. Said receptacle is in the form of a box which is open at the top and having an opening in the front between two relatively narrow flanges 47 against which the paper sheets are held by a spring-pressed follower 47 These sheets are successively conveyed from said receptacle to and deposited against the foraminated face 30 of the mold block 30 by means of a carriei 49 and through the instrumentality of vacuum controlled means. The carrier consists in a hollow body provided with a perforated wall 49 and suspended by a link 50 from a lever 51 which is fulcrumed at 51, said lever being actuated by a pitman 52 from a crank wheel 24 on the shaft 24.

The carrier is adapted to be lowered from its position in front of the receptacle 47, as illustrated, into a position in front of the block 30 when such block is in its outer position from the axis of the core and, as the block is moved inwardly, the carrier is returned to its former position. The carrier by suction power presently to be described, withdraws one sheet of paper from the receptacle; when the carrier presents the sheet in front of the referred to block, the suction is discontinued in the carrier and created in the block to cause the transfer of the sheet thereto and by which it is held until after the sheet is embraced between the block and the aforementioned face 29 of the core member 29. The referred to suction effects are attained by means of a vacuum, or reduced air pressure, which may be created in any suitable manner and, preferably, through the medium of a reservoir 54, which is connected by a pipe 54 at the port 55 of a valve casing 55 rigidly connected to the machine frame. Within this casing is a valve comprising two pistons 56 and 56 which are connected by a rod 56 to the mold member 10 to be actuated thereby. The valve casing 55 has a port 55 opening into the external atmosphere and also has a port 55 connected by a flexible pipe 57 with a port 57 provided in a wall of the mold member 10 and also has a port 55 connected by a flexible pipe 60 with an opening 60 in the carrier 49. Said wall is also provided with a port 58 opening into the external atmosphere.

The action of the sheet-conveying appliances may be explained as follows: With the various parts of the mac lne in the positions in which they are shown in Fig. 1, a sheet of the transparent material, denoted by 48 is clamped between the opposing faces of the block 30 and of the core member 29 while the block 30 is pushed back from lts extreme protruding position with respect to the mold member 10 Being thus V located, the ports 58 and 61 of the member and block respectively, are in register for the admission of air into the block interior, which will occur at approximately the time the air is exhausted from the carrier 49 through the pipe 60 and port of the valve casing to draw one of the sheets 48 against the face of said carrier 49. During the beginning of the outward travel of the mold member 10 it is, by reason of the spring 31, unaccompanied by the block 30, which will cause the port 58 to become inoperative and ultimately bring the port 61 into register with the port 57 When the moldmember 10 is moved to its extreme outward position, the double piston valve is moved through the agency of rod 56 into position to allow the air to be withdrawn from the interior of the block 30 in order to draw the sheet 48 from the carrier 49,

which latter hasmeanwhile been lowered into position in front of said block 30, and to which carrier air has been admitted by the travel of the double valve through the pipe and port 55 The carrier then ascends to receive another sheet and that attached to the block is carried forward in advance of the same to be clamped between the core part 29 and the block, the spring behind the latter yielding to allow the ports 58 and 61'to again register for the admission of air torelease the sheet. The sheet thus held between the core and the block has its edges projecting outside of the perimeters of the faces 29 and 30 of the respective parts, as indicated in Fig. 2, so that when the pulp is compressed in the mold cavity, such edges will be incorporated with the material.

In forming a bottle, the members 27 28 and 29 of the core, are raised on the crosshead 32 by means of the cam wheel 37 into the space within the mold members 10 and 10 and guide members 17, and the core 1s then expanded by means of the cam elther fully or at least sufficiently to bring the face 29 0f the member 29 coextensive with tilt the outer peripheral surfaces of the members 27. Said mold and guide members then occupy substantially the positions in which they are indicated in Fig. 2 by the broken 7 which is now ready to admit to the mold.

This is accomplished through the lever 42'l2 which regulates the valve 46 and the plunger 40 to supply a charge of the material into the mold, and which material is subsequently compressed by the ultimate inward movement of the mold members 10 and 10 up to their full-line positions, Fig. 2, which is effected by means of the slots 19 and the ultimate outward movements of the core members, if not already fully expanded as above explained. The bottle body is thus formed with the sheet 48 included therein, the masked portion.of the same forming part of the wall; after which the core is contracted and lowered and the mold and guide parts withdrawn through the action of the controlling mechanism therefor applied oppositely to that above described, members 10 and 17 being brought to positions indicated by broken lines 10 and 17 and the member 10 to a position outside its broken 'line position, to accommodate the carrier 49. A completed bottle body may then be removed from below so as to enable the machine to produce another, and so on.

The invention will, it is thought, be understood from the foregoing description.

What I claim, is

1. An improvement in the art of forming articles from pulp, consisting in introducing into a mold asheet of semitransparent material, retaining said sheet with a portion thereof masked supplying a charge of pulp into the mold, and then subjecting such a charge to a. compressive force so that the edges only of said sheet will be embedded in the pulp.

2. An improvement in the artof forming a hollow article with an opening in its peripheral wall which is closed by a. translucent sheet, consistingof retaining said sheet in a mold so that a. portion of the sheet will bemasked, supplying a charge of the plastic material into themold cavity, and finally compressing said material so that the unmasked portions of the sheet will be em bedded therein.

3. An improvement in the art of forming receptacles from pulp and a. sheet of transparent material, consisting of temporarily holding the sheet at its central portion between the core and an element of a mold having separable members, then supplying a predetermined charge of the pulp into the cavity of the mold, contractin said mold so as to compress the pulp in the space between the mold and the core, and thereby embed the edges of said sheet in the pulp,

4. An improvement in the art of forming from pulp and a sheet of transparent material a hollow article, consisting of compressing the pulp between an expansible core and a contractile mold, said core and mold being provided with members adapted to clamp said sheet therebetween so that the edges of the sheet will be embedded in the pulp and then-contracting the core and expanding the mold for the removal of the article.

5. -An improvement in the art of forming from pulp and a sheet of transparent material a hollow article, consisting of compressing the pulp between a core and a mold, said core and mold being provided with members adapted to clamp said sheet therebetween so that the edges of the sheet will be embedded in the pulp. v

6. An improvement in the art of forming hollow articles from fibrous material, consisting in first introducing into the form a sheet of the non-opaque material so that a portion of the sheet will be masked between external and internal members of said form, second, supplying a charge of the fibrous material into the form, and third, subjecting pulp, consisting in introducing into the form a sheet of non-opaque material so that a portion of the sheet will be masked, next supplying into the form a charge of the pulp, and then subjecting such charge to a compressive force so that the unmasked portions of the sheet will be united with said pulp and the masked portion constitute a transparent part of the wall.

8. An improvement in the art of forming articles from pulp, consisting in introducing into a form a sheet of semi-transparent material, supplying a charge of pulp into the form, so as to embed the outer portions only of such sheet within the pulp.

Signed at Seattle, Washington, this 18th day of August, 1915.

LOUIS B. ALLAIN.

Witnesses:

PIERRE BARNES, E, PETERSON.

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