Method of forming raceway knockout

Patent metadata

Field	Value
Publication number	US-2016368203-A1
Application number	US-201615257055-A
Country	US
Kind code	A1
Filing date	Sep 6, 2016
Priority date	Sep 28, 2012
Publication date	Dec 22, 2016
Grant date	—

Abstract

A method for forming a knockout on a raceway includes removing a knockout from the raceway to form an opening, positioning the knockout within the opening, and thereafter attaching the knockout to the raceway by welding the knockout and the raceway together.

First claim

What is claimed is:

1 . A welding horn for welding plastic material along a weld seam, the welding horn comprising:
a welding surface; and a plurality of energy directors positioned on the welding surface and adapted to transmit ultrasonic energy to the plastic material, each energy director including a truncated pyramid having a recessed peak.

2 . The welding horn of claim 1 , wherein the welding surface has a shape substantially corresponding to a shape of the weld seam.

3 . The welding horn of claim 1 , wherein the welding surface forms a closed shape.

4 . The welding horn of claim 1 , wherein the recessed peak of the energy director includes a dimple having a generally hemispherical shape.

5 . The welding horn of claim 1 , further comprising a non-welding surface adjacent the welding surface.

6 . The welding horn of claim 5 , wherein the welding surface at least partially encloses the non-welding surface.

7 . The welding horn of claim 1 , wherein the plurality of energy directors are arranged such that at least some of the energy directors are adapted to span across the weld seam and form a weld therein, wherein a maximum distance between adjacent energy directors that span across the seam is less than a predetermined maximum length.

8 . The welding horn of claim 1 , wherein the plurality of energy directors are arranged in multiple rows extending along the welding surface.

9 . The welding horn of claim 8 , wherein the rows of the plurality of energy directors are oriented at an acute angle with respect to an edge of the welding surface.

10 . A welding horn for welding plastic material along a weld seam, the welding horn comprising:
a welding surface; and a plurality of energy directors positioned on the welding surface and adapted to transmit ultrasonic energy to the plastic material, the plurality of energy directors arranged in multiple rows, each row oriented at an acute angle with respect to an edge of the welding surface such that at least some of the energy directors are adapted to span across the weld seam.

11 . The welding horn of claim 10 , wherein the welding surface has a shape substantially corresponding to a shape of the weld seam.

12 . The welding horn of claim 10 , wherein the welding surface has a substantially rectangular shape.

13 . The welding horn of claim 10 , wherein the welding surface forms a closed shape.

14 . The welding horn of claim 10 , wherein each energy director includes a truncated pyramid and a recess, the truncated pyramid having an outer surface, the recess formed on the outer surface.

15 . The welding horn of claim 14 , wherein the recess includes a dimple having a generally hemispherical shape.

16 . The welding horn of claim 10 , further comprising a non-welding surface adjacent the welding surface.

17 . The welding horn of claim 16 , wherein the welding surface at least partially encloses the non-welding surface.

18 . The welding horn of claim 10 , wherein a maximum distance between adjacent energy directors that span across the weld seam is less than a predetermined maximum length.

Assignees

• Bemis Mfg Co

Inventors

• Bauer David
• Kletzien Scott
• Smith Jim

Classifications

• B29C66/24244

  forming a rectangle · CPC title

• B29C66/9517

  characterised by specific vibration amplitude values or ranges · CPC title

• B29C66/8322

  Joining or pressing tools reciprocating along one axis · CPC title

• B29C66/472

  said single elements being substantially flat · CPC title

• B29C66/81433

  being toothed, i.e. comprising several teeth or pins (comprising a single tooth B29C66/81429), or being patterned · CPC title