US1939582A - Paste dispensing device - Google Patents

Description

De. 12, 1933. H. H. HOMPSON 1,939,582

PASTE DISPENSING DEVICE Filed Oct. 26, 1932 6 INVENTOR WITNESS H H T]? 6 WA BY 113k ATTORN EY Patented l )ec.'1 2, 19 33 u IrEosrA PATENT OFFICE -PAsTn msPENsmG DEVICE Harry Thompson, Medina, Ohio Application amnes a, i932: SerialNo. 639,681 I 2Claims. (013221578) My invention relates to improvements'in devices for dispensing material in paste or plastic form, such as tooth paste and the like, and it consists in the combinations, constructions and arrangements herein described and claimed.

A number of devices for dispensing paste have been used, but these devices have certain objec-' tionable features. Those of the plunger type usually require a tight or sliding fit between the plunger and the cylinder wall. Others require specially constructed valves. In some the upward movement of the plunger is liable'to take with it some of the paste and certain of the devices are costly to make.

An object of my invention is to provide a device for dispensing paste which can be made at a low cost and in whichthe use of ports or valves is obviated.

A further object is to provide a device of the type in which a plunger is caused to reciprocate to effect the ejection of a portion of the paste, the ejecting stroke being controlled 'by a spring so that the stroke is uniform. I 25' A further object is to provide a dispensing. device having a plunger which is so made as to cause the paste to be pushed aside during the upward stroke, but to be caught under the face of the plunger and ejected on the downward stroke.

A further object is to provide a device in which in the discharge opening, thereby preventing the opening from clogging due to the drying of the paste and insuring the instant discharge of the 5 paste when the device is in use.

Other objects and .advantages will appear inv the following specification and the novel features of the invention will be particularly pointed out 4 in the appended claims. 4b

device, and

Figure 2 is a vertical central sectional view.

In carrying out my invention I make use preferably of a glass container of the shape shown in the drawing. This has a cylindrical body por-' tion 1 which is threaded at 2 to receive a threaded cap 3. The body is provided with integral spaced-apart flanges 4 and 5 respectively. The space between these flanges forms a groove for receiving a. supporting band 6 which maybe held in position by means of screws 7. Below the lower band 5 the bottom of the container is curved in the manner shown. At the central portion of the bottom there is an opening 8 through which the paste is discharged.

The cap 3 is provided with an opening 9 and disposed in this opening is the stem 10 of the plunger 11.. The stem has-a flange portion 12. Arranged to bear on the flange portion 12 at one end and on the underside of the cap 3 at the other end is a spiral spring 13.

From the foregoing description of the various parts of the devicethe operation thereof may be readily understood. In order to fill the container the screw cap is removed and paste, such as that shown at 14, is placed in the container. The plunger 11 is enlarged towards its lower end, this enlargement being in the form of a gradual 7 outward curve at the side surfaces of the plunger. The latter has a flat face 15 which spans the rounded bottom so as to normally rest on the sides of the container. The-plunger has a reduced extension 16 which extends into the opening 8 and normally closes this opening.

In using the device the plunger stem is grasped and is raised and then released; The raising of the stem will cause the upward travel of the plunger and the paste will be forced aside and down underneath the plunger. Now when the plunger stem 10 is released, the plunger, through the action ofthe spring 13, will be moved downwardly and the paste will be forced out through full effect then the face of the plunger will rest on the sides of the container while the extension 16 will flll the opening.

It will be seen that owing to this construction there is never any danger of the opening becoming clogged nor of any escape of the plastic material through the opening while the device is the liability of the extension adhering to the walls of the openingthrough the drying out of the paste. 1 The plunger forms an auxiliary closure member by its contact with the walls. It will further be noted that when the plunger stem 10 is lifted'no matter how quickly or slowly, the spring 13 will 0 always act when the plunger stem is released with 1 the same force to drive the plunger downwardly and to force the paste out of the opening. This insures a uniform amount of the material with each reciprocation of the plunger.

The flange 12 has a double function since it 1 the opening 8. When the spring has exerted its 85 acts as a means for imparting movement from the spring to the plunger and it also serves to prevent the drawing of any paste through the opening 9 when the plunger stem is raised. The device as described can be manufactured cheaply and is not liable to get out of order, since there are no valves or tight fitting pistons.

I claim:

1. In a paste dispensing device, a container having a tapered bottom and being provided with an opening in said bottom, a cap or closure for said container having an opening, a plunger stem arranged to extend through said closure opening,

a flange carried by the plunger stem, a spiral and constituting an auxiliary closure member, and

an extension carried by said plunger, and arranged to enter the opening in the bottom to prevent the clogging of the opening.

2. In a paste dispensing device, a glass container having a cylindrical body portion, said body portion being threaded at its upper end and being provided with a band-receiving groove, the bottom portion of the container being tapered and having a discharge opening at its lower end, a threaded cap arranged to be screwed to the body portion and havinga central opening, a plunger stem arranged to extend through said central opening, said plunger stem having a flange di posed'withinthe container, a spiral spring disposed between the flange and the cap, a plunger having curved outwardly flared sides, and being provided with a flat end portion arranged to engage the side walls of the container to form a closure member, and a central extension secured to said plunger and arranged to engage in the opening in the bottom to prevent the clogging thereofz.

HARRY H. THOMPSON.

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