GB2135706A

GB2135706A - Tenter clip

Info

Publication number: GB2135706A
Application number: GB08404161A
Authority: GB
Inventors: Hans H Richter
Original assignee: Marshall and Williams Co
Current assignee: Marshall and Williams Co
Priority date: 1983-02-18
Filing date: 1984-02-17
Publication date: 1984-09-05
Also published as: JPS59163254A; FR2541326A1; GB8404161D0; FR2541326B1; GB2135706B; BR8400403A; DE3405794A1

Abstract

A tenter clip is disclosed having a jaw (10) which is pivotally mounted in an intermediate portion on an upper member (12) of a housing (13) which extends inwardly over a lower plate (15) wherein repair of the wear points is facilitated by providing a central bushing (A) pressed into the jaw for receiving a pin (22) upon which the jaw is pivoted. An outwardly extending fixed controller (B) is carried by a depending gripping portion of the jaw, and a transverse slot (C) opens in a lower edge of the gripping portion removably receiving a gripping blade (D). <IMAGE>

Description

SPECIFICATION Tenter clip This invention relates to tenter clips of the type which are carried by opposed tenter chains and slide upon rails.

Conventionally, the chains are mounted for a run with the web attached therebetween to the respective clips. Such tenter clips include a jaw which is pivotally carried in a housing which in turn includes a lower plate beneath the jaw mounting member. Often such tenter clips include controller members, carried by suitable linkage, which control the positioning of the web inserted between the jaw and lower plate member.

Such tenter clips include a pin carried by the housing upon which a movable jaw member is mounted. When such pins become worn it is customary to insert a larger pin which requires reboring the mounting portion of the housing, as well as the central bore of the bracket, to accommodate the pin within the pivoted jaw member. Another significant wear point of the tenter clip is the blade portion which confines the web beneath the movable jaw above the lower plate. Such member is generally an insert which is permanently secured in the slot within the jaw.

Common practice, when the sharpened edge becomes worn, is to bevel and turn down the edge of the insert for reuse of the member. This expedient may take place only a limited number of times and such resharpening has the added disadvantage of destroying the proper alignment between the blade and the other members of the gripping jaw arrangement. The above deficiencies of such tenter clips are inherent in the structures illustrated in United States Patent Nos.

1,984,616, 1,927,998,3,058,191 and 3,514,823.

When reconditioning and repairing tenter clips and chains it has been found that the majority of the expense involves labour and that the items referred to above account for on the order of about half of such expenses.

In one aspect the invention provides a tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate, comprising: a central bushing pressed into said jaw; a pin extending into said bushing upon which said jaw is pivoted; an outwardly extending controller carried by a depending gripping portion of said jaw; a transverse slot opening in a lower edge of said gripping portion; and a gripping blade removably secured in said transverse slot.

In another aspect the invention provides a tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate, comprising: a transverse slot opening in a lower edge of a depending gripping portion of said jaw; a gripping blade removably secured in said transverse slot; an arcuate seat formed in said gripping portion extending into said slot; an arcuate portion of said gripping blade conforming to said arcuate seat; and fastening means securing said gripping blade in said slot after self-adjustment thereof to insure conformity of the blade to said lower plate.

It is thus possible to provide for replaceable parts which may be utilized at the major wear points of a tenter clip in order to reduce the cost of parts and labour involved in reconditioning tenter clips and chains.

The invention will now be more particularly described by way of example, with reference to the accompanying drawings, in which: Figure 1 is a side elevation, illustrating a tenter clip constructed in accordance with the present invention including parts which may be discarded at the wear points adjacent the pivot point of the jaw and adjacent the insert in the lower edge thereof.

Figure 2 is a front elevation with parts broken away, illustrating the removeable, self-aligning blades, and Figure 3 is a section elevation taken on line 3-3 in Figure 2.

The drawings illustrate a tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate. A central bushing A is pressed into the jaw. A pin extends into the bushing upon which the jaw is pivoted. An outwardly extending controller B is fixedly carried by a depending gripping portion of the jaw. A transverse slot C opens in a Iwer edge of the gripping portion, and a gripping blade D is removably secured in the transverse slot. An arcuate seat E is formed in the gripping portion extending into the slot, and an arcuate portion is carried by the gripping blade conforming to the arcuate seat. Fastening means secure the gripping blade in the slot after adjustment insuring that the blade conforms to the lower plate for even gripping of the web.

The tenter clip is illustrated in Figure 1 wherein a jaw 10 is pivotally mounted in an intermediate portion thereof illustrated at 11 upon an upper bracket portion 12 of a housing 13. A lower portion of the housing i 3 extends inward in the form of a lower portion 14, thus forming a generally "U" shaped bracket. A wear plate 1 5 is provided to accommodate the web passing thereover on the upper surface of the lower member 14 thus serving as a lower plate for gripping the web illustrated in broken lines in Figure 1. A wear portion is provided at 1 6 for sliding motion upon rail 20.The sliding surface 1 6 is formed upon the lower portion of a customary bracket or base 1 8 secured to the housing 13 by the bolt 1 9. The base portion 1 8a which has the sliding surface 1 6 of the bracket 18 is carried by the rail 20 which has a slide casing 20a for carrying the chain 21. A top casing 20b retains the tail 1 8b of the bracket 18.

The central bushing A is illustrated as being pressed into the central portion of the jaw to accommodate a pin 22. The controller B is attachable in selected positions upon the bracket member 23 and is fixed therein. A transverse slot C is provided in the lower edge of the gripping portion and opens so that a lower edge of the gripping portion accommodates a gripping plate D.

Referring now to Figures 2 and 3, it will be noted that the slot C has an arcuate seat E formed in the gripping portion extending therein.

An arcuate seat E is formed in the gripping portion by the gripping blade conforming thereto.

Suitable fastening means illustrated as a bolt 25 secures the gripping blade in the slot after adjustment insuring that the blade conforms to the lower plate for even gripping of the web. The bolt 25 has a threaded shank 25a which extends through an opening 25b in the central portion of the blade assuring gripping of the blade, securing same within the slot in self-adjusted position.

While a preferred embodiment of the invention has been described using specific terms, such description is for illustrative purposes only and it is to be understood that changes and variations may be made without departing from the scope of the following claims.

Claims

1. A tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate, comprising: a central bushing pressed into said jaw; a pin extending into said bushing upon which said jaw is pivoted; an outwardly extending controller carried by a depending gripping portion of said jaw; a transverse slot opening in a lower edge of said gripping portion; and a gripping blade removably secured in said transverse slot.

2. The structure set forth in Claim 1, including a seat formed in said gripping portion extending into said slot receiving said blade when adjusted to conform to said lower plate.

3. The structure set forth in Claim 2, including a bracket extending rearwardly form said gripping portion of said jaw fixedly receiving said controller in fixed position.

4. A tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate, comprising: a transverse slot opening in a lower edge of a depending gripping portion of said jaw; a gripping blade removably secured in said transverse slot; an arcuate seat formed in said gripping portion extending into said slot; an arcuate portion of said gripping blade conforming to said arcuate seat; and fastening means securing said gripping blade in said slot after self-adjustment thereof to insure conformity of the blade to said lower plate.

5. The structure set forth in Claim 4, wherein said arcuate seat is centrally positioned along said slot, and said fastening member includes a threaded shank producing gripping engagement with said blade.

6. A tenter clip having a jaw which is pivotally mounted in an intermediate portion on an upper member of a housing which extends inwardly over a lower plate, comprising: a transverse slot opening in a lower edge of a depending gripping portion of said jaw; and a gripping blade removably secured in said transverse slot.

7. A tenter clip substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.