Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3886711 A
Publication typeGrant
Publication dateJun 3, 1975
Filing dateJun 12, 1974
Priority dateJun 12, 1974
Publication numberUS 3886711 A, US 3886711A, US-A-3886711, US3886711 A, US3886711A
InventorsDon R Brothers, Edwin D Stewart
Original AssigneeCentury Ind Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method for forming caulking tube cartridges
US 3886711 A
Abstract
The specification and claims disclose a method and apparatus for performing two manufacturing steps substantially simultaneously during the formation of a caulking tube cartridge. In general, the disclosed method includes the steps of providing a generally cylindrical anvil member adapted to be received in the piston end of the caulking tube; providing a flange ring member including a cylindrical open-ended section having a radially-extending flange; and, providing a protective cap adapted to snap on the nozzle end of the caulking tube. The open-ended section of the flange ring is positioned in the piston end of the tube with the flange overlying the end of the tube. The cap is axially aligned with the tube, and a force is applied to move the tube onto the anvil member. The force is sufficient to snap the cap onto the tube. Thereafter, the tube is rotated and the flange portion is deformed into a bead engaging the end of the tube. The specification also discloses apparatus specifically suited for carrying out the above sequence of steps.
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 1191 Brothers et a1.

[ METHOD FOR FORMING CAULKING TUBE CARTRIDGES [75] Inventors: Don R. Brothers, Canfield; Edwin D.

Stewart, Austintown, both of Ohio [73] Assignee: Century Industries Corporation,

New Waterford, Ohio [22] Filed: June 12, 1974 [21] Appl. No.1 478,443

[ June 3, 1975 Primary ExaminerC. W. Lanham Assistant ExaminerE. M. Combs Attorney, Agent, or Firm-Sidney W. Millard 1571 ABSTRACT The specification and claims disclose a method and apparatus for performing two manufacturing steps substantially simultaneously during the formation of a caulking tube cartridge. In general, the disclosed method includes the steps of providing a generally cylindrical anvil member adapted to be received in the piston end of the caulking tube; providing a flange ring member including a cylindrical open-ended section having a radially-extending flange; and, providing a protective cap adapted to snap on the nozzle end of the caulking tube. The open-ended section of the flange ring is positioned in the piston end of the tube with the flange overlying the end of the tube. The cap is axially aligned with the tube, and a force is applied to move the tube onto the anvil member. The force is sufficient to snap the cap onto the tube. Thereafter, the tube is rotated and the flange portion is deformed into a bead engaging the end of the tube. The specifi cation also discloses apparatus specifically suited for carrying out the above sequence of steps.

2 Claims, 4 Drawing Figures [52] US. Cl. 53/14; 53/128; 53/284 [51] Int. Cl B65b 7/28; 1365b 3/00 [58] Field of Search 53/14, 42, 128, 284, 334

[56] References Cited UNITED STATES PATENTS 1,152,598 9/1915 Butler 53/14 1,517,740 12/1924 Malmquist... 53/334 2,447,524 8/1948 Nordquistnm 53/334 2,916,861 12/1959 Lehmann t 53/42 3,000,163 9/1961 Bellamy 53/128 3,238,699 3/1966 Morton 53/284 3,295,672 1/1967 Lemelson 53/14 FOREIGN PATENTS OR APPLICATIONS 1,343,415 1/1963 France 53/14 44 55 fso PATENTEUJUAB ms SHEET METHOD FOR FORMING CAULKING TUBE CARTRIDGES BACKGROUND OF THE INVENTION The subject invention is directed toward the packaging art and. more particularly. to a method and apparatus for applying a protective cap on the nozzle end of a caulking tube while substantially simultaneously therewith rolling a bead on the piston end of the tube.

In commonly-assigned copending application Ser. No. 418,600, filed Nov. 23. 1973 for CAULK CAP, there is disclosed a protective cap adapted to be snapped into position on the nozzle end of a caulking cartridge. The cap is designed to seal the nozzle after the nozzle has been cut and a portion of the caulking compound used. In order to assure that the cap provides a good seal and is not easily dislodged during shipping or handling. it must have a relatively tight, snap-on fit with the tube.

The tight fit required of the cap presents some problems during manufacture. Although the caps are designed to be removed and applied manually, this is not economically practical during high volume manufacturing runs.

The subject inventor has developed a method and apparatus by which a protective cap of the general type described can be readily applied or installed at substantially the same time as another step of the tube manufacturing sequence is carried out. In particular, the tubes which constitute the body of the cartridge are generally formed of paperboard. Normally, during manufacture, a flange ring is placed in the piston end of the tube. The flange portion of the ring is then rolled over the end edge of the tube to form a protective and- /or reinforcing bead.

BRIEF DESCRIPTION OF THE INVENTION The subject invention provides a method and apparatus by which the two above-discussed manufacturing steps can be combined into what is, in effect, a single operation. In accordance with one aspect of the invention, the method generally comprises the steps of:

a. providing a generally cylindrical, rotatable anvil member adapted to be closely received within the piston end of the caulking tube;

b. providing a flange ring member including a cylin drical, open-ended section having a flange extending radially outwardly from one end thereof;

c. providing a protective cap adapted to snap on the nozzle end of the caulking tube;

d. positioning the cylindrical open-ended section of the flange ring member in the piston end of the tube with the flange overlying the end edge of the tube and axially aligning the cap with the tube;

e. axially aligning the piston end of the tube with the anvil and applying sufficient axial force to move the anvil into the piston end of the tube and cause the cap to snap onto the nozzle end; and,

f. rotating the tube and the anvil and deforming the flange into a bead about the piston end of the cartridge.

The preferred form of apparatus for carrying out the method constitutes a second aspect of the invention and generally includes a cylindrical anvil member mounted for rotation about its axis. Spaced from the anvil and axially aligned therewith is a cooperating pis ton member having a recess which faces the anvil member and is adapted to receive the end of the protective cap. Actuating means are provided to drive the piston member toward the anvil under sufficient pressure to cause the anvil to enter the piston end of the cartridge and the cap to be snapped onto the nozzle end of the cartridge. Additionally, power means are provided to rotate the cartridge while it is thus held between the anvil member and the piston member. Also, rolling means are provided to roll the flange into a bead about the piston end of the cartridge during rotation of the cartridge.

As is apparent from the foregoing, the operations of cap applying and bead rolling are effectively combined into a single operation or machine. This has the result of greatly simplifying the overall manufacturing of the cartridges.

Accordingly, a primary object of the invention is the provision of a method and apparatus which combines operations which were previously carried out in separate manufacturing operations.

A more specific object is the provision of an apparatus wherein the movement which positions the cartridge for the bead-rolling operation also applies the protective cap.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and advantages will hecome apparent from the following description when read in conjunction with the accompanying drawings wherein:

FIG. I is a longitudinal cross-sectional view through a caulking tube or cartridge of the type which can be manufactured or assembled through the use of the subject method and apparatus;

FIG. 2 is a schematic in pictorial form of an apparatus formed in accordance with a preferred embodiment of the invention; and,

FIGS. 3 and 4 show the sequence of operations for the apparatus of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring more particularly to the drawings wherein the showings are for the purpose of illustrating a pre ferred embodiment of the invention only, and not for the purpose of limiting same, FIG. I shows the overall arrangement of a caulking tube or cartridge of the type which can be readily assembled through the use of the subject method and apparatus. As can be seen, the caulking tube or cartridge assembly 10 comprises a main tubular body 12 generally formed from a relatively heavy paperboard tube. At the upper end of the body 12 is a nozzle member 14 which is typically formed from plastic and carried on a disc-like metal end wall 16 which has its outer periphery I8 flanged over the upper end of the paperboard body I2. In the tube or cartridge assembly 10, a molded plastic cap 20 is releasably snapped to the upper end of the body and arranged to provide a seal for the nozzle 14. This particular cap structure is shown and described more fully in US. Pat. application Ser. No. 4l8,600, filed Nov. 23, 1973. The seal means comprise an internal cylindrical portion 22 which extends downwardly from the interior surface of the cap 24. The cylindrical portion 22 is sized so as to tightly engage about the nozzle I4. Consequently, after the nozzle is open, replacement of the cap tightly seals the open end of the nozzle. The cap is tightly but releasably retained on the tube by a snap flange assembly 26 which engages about the bead 18.

During original assembly of the tube-cap combination, the caps must be snapped onto the tube. Although the snapping can be accomplished manually, in largescale production of the assembly this can constitute a substantial amount of work.

In accordance with the subject invention, the snapping of the cap onto the end of the tube is combined with an additional manufacturing step to reduce the overall problems involved. In particular, about the lower end of the tube body 12 there is a rolled flange 3|). Flange 30 is a portion of a flange ring 32 which is slidably received within the piston member 34. As is well known. the piston member 34 is adapted to slide longitudinally in the tube under the influence of an associated caulking gun plunger or the like. Movement of the piston 34. of course, causes the caulking material within the body l2 to be expelled through the nozzle 14. During the manufacture of the tube, the flange member 32 has an original shape shown in FIG. 1 with dash-dot lines. It should be noted that the rolled-over flange portion 30 merely extends outwardly in a radial direction and joins to the cylindrical center portion of the flange ring 32.

The overall sequence of operations used to assemble the cartridge assembly can best be understood by reference to FIGS. 2-4.

As shown in FIG. 2, the overall apparatus used comprises a first plunger member 38 which is suitably mounted for vertical reciprocation. The particular manner in which the plunger member is driven is not important to the subject invention; however, manual actuation such as through a foot operator or the like could be used if desired. The upper end of the plunger 38 includes a cup-shaped member 40 which is preferably mounted for free rotation relative to the plunger 38. The cup-shaped member 40 has a central opening 42 which is sized so as to freely but closely receive the outer end of the protective cap 20.

Axially spaced from the plunger 38 and axially aligned therewith is an anvil member 44. The anvil member 44 is rotatably mounted and includes drive means 46 adapted to impart driving movement to rotate the anvil in the manner shown. The lower end of anvil member 44 has a reduced diameter portion 48 which is sized so as to be closely received within the flange ring 32. The length of the end portion 48 is preferably slightly less than the depth D from the base of the flange ring to the wall of the plunger 34. As can be seen, the juncture between the reduced diameter end portion 48 and the main body of the anvil provides a shoulder which can bear against the end face or flange portion of the flange ring 32.

Associated with the anvil 44 are one or more crimping rollers 50 which are carried by suitable actuating means 52. The actuating means 52 are positioned to drive the crimping rollers toward the anvil roller. The outer periphery 54 of the crimping rollers 52 include a bead-forming groove 55. The grooves 55 are arranged to as to deform the radially-extending portion of the flange ring into the bead 30.

FIGS. 3 and 4 best illustrate the use of the apparatus of FIG. 2. In particular, as shown in FIG. 3, the operation begins with the plunger spaced apart from the anvil 44 in the manner shown. To begin, a cap and cartridge body 10 are loosely assembled in the relationship shown and the cap received in the opening 42 of the upper end of the plunger. At this time, the crimping rolls 50 are in a retracted position as shown With the cap and cartridge body loosely assembled and posi tioned on the upper end of the plunger, the plunger is actuated upwardly to the position shown in FIG. 4. The upward actuation by the plunger causes the tube to be moved onto the anvil 44. That is, the reduced diameter end portion 48 of the anvil 44 enters within the flange ring 32. At this time or subsequent thereto, the driven anvil 44 rotates the tube relative to the plunger 38. With the tube assembly 10 rotating, the crimping rol lers 50 are driven inwardly to the position shown in FIG. 4. During inward movement of the crimping rollers 50, the radially-extending flange of the flange ring 32 is caused to deflect over into a bead 30 which tightly grips the paperboard tube 12. As can be appreciated, the movement which brings the tube assembly into proper position on the anvil also causes the cap to be snapped tightly into its position on the nozzle end of the tube.

After bead 30 has been formed, the crimping rolls are retracted. Subsequent thereto, the plunger is reciprocated to a lower position and the assembled cartridge assembly 10 removed from the upper end of the plunger.

The invention has been described in great detail sufficient to enable one of ordinary skill in the packaging art to make and use the same. Obviously, modifications and alterations of the preferred embodiment will occur to others upon a reading and understanding of the specification and it is my intention to include all such modifications and alterations as part of my invention insofar as they come within the scope of the appended claims.

Having thus described my invention, I claim:

I. A method for forming a caulking cartridge of the type including a cylindrical body which holds the caulking material and having a nozzle end and a piston end, comprising the steps of:

a. providing a generally cylindrical rotatable anvil member adapted to be closely received within the piston end of the caulking cartridge;

b. providing a flange ring member including a cylindrical open-ended section having a flange extending radially outwardly from one end thereof;

c. providing a protective cap adapted to snap on the nozzle end of the caulking tube;

d. positioning the cylindrical open-ended section of the flange ring member in the piston end of the cartridge with the flange overlying the end edge of the body and axially aligning the cap with the cartridge; and,

e. axially aligning the piston end of the cartridge with the anvil and applying sufficient axial force to move the anvil into the piston end of the cartridge to cause the cap to snap onto the nozzle end of the body and rotating the body and the anvil relative to a deforming means and deforming the flange with said means into a bead about the piston end of the cartridge.

2. The method as claimed in claim 1 including the step of deforming the flange into a bead by moving rotatable roller members radially inward toward the

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1152598 *Nov 20, 1913Sep 7, 1915Us Cartridge CompanyMethod of constructing packages.
US1517740 *Oct 20, 1921Dec 2, 1924Malmquist Machine CompanyCan-capping mechanism
US2447524 *Jun 25, 1945Aug 24, 1948American Can CoCan closing machine
US2916861 *Mar 26, 1952Dec 15, 1959Harry LehmannDevice and method for closing and sealing containers
US3000163 *May 21, 1956Sep 19, 1961Bellamy Jr John BCarton sealer rollers
US3238699 *Feb 6, 1962Mar 8, 1966Automotive Dev IncFilter cartridges and machine for making the same
US3295672 *Oct 14, 1964Jan 3, 1967Lemelson Jerome HPackaging assemblies
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4135347 *Oct 15, 1976Jan 23, 1979International Paper Co.Method and apparatus for producing a dispensing tube
US5533316 *May 4, 1995Jul 9, 1996Self Industries, Inc.Apparatus for compressing and positioning the sealing components of an open head drum
US6076712 *Oct 22, 1998Jun 20, 2000Esber; Alex S.Flexible caulk tube nozzle
US7014079Dec 23, 2003Mar 21, 2006Jeffrey J. SwannCaulking tube replacement tip
Classifications
U.S. Classification53/488, 53/489, 53/138.1, 53/284
International ClassificationB65B7/28, B31B17/00, B29C65/58, B29C65/50, B29C53/34, B29C65/56
Cooperative ClassificationB29C66/534, B29L2031/715, B29C65/58, B29C65/5042, B31B2217/082, B31B17/00, B65B7/28, B29C65/568, B29C66/65, B29C65/56, B29C66/83221, B29C57/12
European ClassificationB29C66/534, B29C65/58, B29C65/56, B29C65/50B, B31B17/00, B29C66/65, B29C65/56H2, B29C66/83221, B29C57/12, B65B7/28