CA1064328A - Weatherseal manufacture - Google Patents
Weatherseal manufactureInfo
- Publication number
- CA1064328A CA1064328A CA287,102A CA287102A CA1064328A CA 1064328 A CA1064328 A CA 1064328A CA 287102 A CA287102 A CA 287102A CA 1064328 A CA1064328 A CA 1064328A
- Authority
- CA
- Canada
- Prior art keywords
- pile
- strip
- shaped portion
- support portion
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
WEATHERSEAL MANUFACTURE
ABSTRACT OF THE DISCLOSURE
A weatherseal is made by preparing a long, thin strip of pile material and cross-head extruding a resin base having a relatively thick, generally flat support portion formed on the back of the pile strip and a relatively thin portion U-shaped in cross section and joined to opposite side edge regions of one face surface of the support portion while arching over the pile strip.
While the resin material is still plastic, a substantially lower pressure is produced outside the U-shaped portion than inside this portion to expand this portion away from the support portion and reduce the thickness of the wall of the U-shaped portion. The resin material is set with the U-shaped portion expanded over the pile strip. The result is one product of the invention. As an alternative, a modified product can be obtained by cutting each side of the U-shaped portion at the approximate height of the pile from the support portion to leave a pair of thin, spaced-apart resilient fins extending away from the support portion on opposite sides of the pile strip.
ABSTRACT OF THE DISCLOSURE
A weatherseal is made by preparing a long, thin strip of pile material and cross-head extruding a resin base having a relatively thick, generally flat support portion formed on the back of the pile strip and a relatively thin portion U-shaped in cross section and joined to opposite side edge regions of one face surface of the support portion while arching over the pile strip.
While the resin material is still plastic, a substantially lower pressure is produced outside the U-shaped portion than inside this portion to expand this portion away from the support portion and reduce the thickness of the wall of the U-shaped portion. The resin material is set with the U-shaped portion expanded over the pile strip. The result is one product of the invention. As an alternative, a modified product can be obtained by cutting each side of the U-shaped portion at the approximate height of the pile from the support portion to leave a pair of thin, spaced-apart resilient fins extending away from the support portion on opposite sides of the pile strip.
Description
~064328 This application is a division of application Serial No. 217,611 filed January 9, 1975.
Pile weatherseals having associated sealing fins runninq longitudinally with the pile material have generally known advantages. Such sealing fins have been applied to pile weatherseals in various ways, and they have been located in the center of the pile, and along both side edges of the pile. The invention involves recognition of a simpler and more economical way of making a finned pile weatherseal having fins extending along both side edges of the pile. The invention aims at economy, faster and simpler production methods, and quality construction of the resulting weatherseal.
SUMMARY OF THE INVENTION:
; To this end, the invention consists of a weather- -~
seal making method comprising: (a) preparing a long, thin strip of pile material; (b) cross-head extruding a resin base having a relatively thick, generally flat support portion - formed on the back of said pile strip and a relativelythin portion U-shaped in cross section and joined to opposite side edge regions of one face surface of said support portion and arching over said pile strip; tc) while said resin material is still plastic, producing a substantially lower i pressure outside said U-shaped portion than inside said U-shaped portion to expand said U-shaped portion away from said support portion and reduce the thickness of the wall ~-of said U-shaped portion; and (d) setting said resin material .
, with said U-shaped portion expanded over said pile strip.
i~ Optionally, the invention may also include cutting each side of said U-shaped portion at the approximate ` height of said pile from said support poxtion to leave a A
,'. . . . .
.`~
~ 10643Z8 pair of thin, spaced-apart resilient fins extending away from said support portion on opposite sides of said pile strip.
In a product aspect, the invention consists of a weatherseal comprising: (a) a relatively thick, flat resin base formed as a long narrow strip; (b) a long, narrow strip of pile material secured to one face surface of said resin base and extending along a longitudinal central region of said base; and (c) a relatively thin-walled resin tube U-shaped in cross section and joined to opposite side edge regions of said one face surface of said support portion and arching over said strip of pile material.
In the drawings:
Fig. 1 is a schematic diagram of a preferred process for practicing the invention, also showing cross-` sectional views of the product at each stage of the process;
and Figs. 2 and 3 are end elevational views of products.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
.. .. _ . . . _ . _ .. _ .. ...
`~ Fig. 1 shows a process for producing double-fin, pile weatherseals such as shown in Figs. 2 or 3. ~The ; weatherseal includes a fibrous pile material, a fin on each .
side of the pile, and a resin basel and is màde in indefinite lengths that can be cut and fitted in place to meet many weatherseal requirements. Such weatherseals are commonly used around doors and windows, and the pile material provides resilience and a low-friction, long-wear-life sealing - 30 surface. The fins on opposite sides of the piles wipe against the surface to be sealed and make the seal more `:
-'''~-.
airtight and watertight than pile alone could accomplish.
In the method of Fig. 1, a strip of pile material 19 having a base 20 is pre-prepared in device 21 in supply lengths available for feeding to cross-head extruder 22 which cross-head extrudes a base over pile 19. The base includes relatively thick, flat support portion 11 and U-shaped portion 12 secured to side edge regions 13 of support 11 and arching over pile 19. Then a pressure differential device 14 expands the U-shaped portion 12 to arch it higher over pile 19 and reduce the thickness of the walls of the U-shaped portion 12. Then cutting device 15 cuts U-shaped portion 12 as illustrated, to leave thln, resilient fins 16 on opposite sides of pile material 19. jThe expansion of the U-shaped portion 12 stretches the fins 16 to a resilient, thin sheet form that is optimum for these fins 16 and is thinner than could be practically extruded as an original shape.
Separate pile strips 24 with associated bases 25 as shown in Fig. 2 secured between fins 16 can be fed to a cross-head extruder for practicing the method of Fig. 1.
Fig. 3 shows a weatherseal 30 made according to the cross-head extrusion method of Fig. 1 having support portion 11 under base 20 of pile 19, and ~-shaped portion ~2 arching over pile 19, but without the cutting step. A
pressure differential is used to expand U-shaped portion 12 slightly above pile 19 as illustrated in Fig. 3 rather than the substantially greater expansion illustrated in the method of Fig. 1, and then the U-shaped portion 12 is left uncut in the final weatherseal 30 so that this U-shaped portion 12 provides a low-friction sealing engagement surface with high resiliency to accommodate various sealing surfaces, and pile 19 provides resilient support preventing the U-shaped portion 12 from collapsing. The U-shaped portion ; 12 then need be expanded only slightly to clear pile 19 ^- by a small amount to produce the desired flexibility, and .~
106432~3 the U-shaped portion 12 makes the pile 19 airtight and watertight and provides a highly resilient surface to be pressed against a surface to be sealed by the resilience of the supporting pile 19. The mentod of Fig. 1 with a slight modification then produces a new weatherseal 30 having many of the advantages of resilient pile and added advantages from enclosing the pile in the resilient, U-shaped portion 12.
Persons wishing to practice the invention should remember that other embodiments and variations can be adapted to particular circumstances. Even though one point of view is necessarily chosen in describing and defining the invention, this should not inhibit broader or related embodiments going beyond the semantic orientation of this ; application but falling within the spirit of the invention.
For example, those skilled in the art will appreciate the many variations in materials, structures, and method steps that can be made in putting the inventive method into practice.
.
' , :. :
Pile weatherseals having associated sealing fins runninq longitudinally with the pile material have generally known advantages. Such sealing fins have been applied to pile weatherseals in various ways, and they have been located in the center of the pile, and along both side edges of the pile. The invention involves recognition of a simpler and more economical way of making a finned pile weatherseal having fins extending along both side edges of the pile. The invention aims at economy, faster and simpler production methods, and quality construction of the resulting weatherseal.
SUMMARY OF THE INVENTION:
; To this end, the invention consists of a weather- -~
seal making method comprising: (a) preparing a long, thin strip of pile material; (b) cross-head extruding a resin base having a relatively thick, generally flat support portion - formed on the back of said pile strip and a relativelythin portion U-shaped in cross section and joined to opposite side edge regions of one face surface of said support portion and arching over said pile strip; tc) while said resin material is still plastic, producing a substantially lower i pressure outside said U-shaped portion than inside said U-shaped portion to expand said U-shaped portion away from said support portion and reduce the thickness of the wall ~-of said U-shaped portion; and (d) setting said resin material .
, with said U-shaped portion expanded over said pile strip.
i~ Optionally, the invention may also include cutting each side of said U-shaped portion at the approximate ` height of said pile from said support poxtion to leave a A
,'. . . . .
.`~
~ 10643Z8 pair of thin, spaced-apart resilient fins extending away from said support portion on opposite sides of said pile strip.
In a product aspect, the invention consists of a weatherseal comprising: (a) a relatively thick, flat resin base formed as a long narrow strip; (b) a long, narrow strip of pile material secured to one face surface of said resin base and extending along a longitudinal central region of said base; and (c) a relatively thin-walled resin tube U-shaped in cross section and joined to opposite side edge regions of said one face surface of said support portion and arching over said strip of pile material.
In the drawings:
Fig. 1 is a schematic diagram of a preferred process for practicing the invention, also showing cross-` sectional views of the product at each stage of the process;
and Figs. 2 and 3 are end elevational views of products.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
.. .. _ . . . _ . _ .. _ .. ...
`~ Fig. 1 shows a process for producing double-fin, pile weatherseals such as shown in Figs. 2 or 3. ~The ; weatherseal includes a fibrous pile material, a fin on each .
side of the pile, and a resin basel and is màde in indefinite lengths that can be cut and fitted in place to meet many weatherseal requirements. Such weatherseals are commonly used around doors and windows, and the pile material provides resilience and a low-friction, long-wear-life sealing - 30 surface. The fins on opposite sides of the piles wipe against the surface to be sealed and make the seal more `:
-'''~-.
airtight and watertight than pile alone could accomplish.
In the method of Fig. 1, a strip of pile material 19 having a base 20 is pre-prepared in device 21 in supply lengths available for feeding to cross-head extruder 22 which cross-head extrudes a base over pile 19. The base includes relatively thick, flat support portion 11 and U-shaped portion 12 secured to side edge regions 13 of support 11 and arching over pile 19. Then a pressure differential device 14 expands the U-shaped portion 12 to arch it higher over pile 19 and reduce the thickness of the walls of the U-shaped portion 12. Then cutting device 15 cuts U-shaped portion 12 as illustrated, to leave thln, resilient fins 16 on opposite sides of pile material 19. jThe expansion of the U-shaped portion 12 stretches the fins 16 to a resilient, thin sheet form that is optimum for these fins 16 and is thinner than could be practically extruded as an original shape.
Separate pile strips 24 with associated bases 25 as shown in Fig. 2 secured between fins 16 can be fed to a cross-head extruder for practicing the method of Fig. 1.
Fig. 3 shows a weatherseal 30 made according to the cross-head extrusion method of Fig. 1 having support portion 11 under base 20 of pile 19, and ~-shaped portion ~2 arching over pile 19, but without the cutting step. A
pressure differential is used to expand U-shaped portion 12 slightly above pile 19 as illustrated in Fig. 3 rather than the substantially greater expansion illustrated in the method of Fig. 1, and then the U-shaped portion 12 is left uncut in the final weatherseal 30 so that this U-shaped portion 12 provides a low-friction sealing engagement surface with high resiliency to accommodate various sealing surfaces, and pile 19 provides resilient support preventing the U-shaped portion 12 from collapsing. The U-shaped portion ; 12 then need be expanded only slightly to clear pile 19 ^- by a small amount to produce the desired flexibility, and .~
106432~3 the U-shaped portion 12 makes the pile 19 airtight and watertight and provides a highly resilient surface to be pressed against a surface to be sealed by the resilience of the supporting pile 19. The mentod of Fig. 1 with a slight modification then produces a new weatherseal 30 having many of the advantages of resilient pile and added advantages from enclosing the pile in the resilient, U-shaped portion 12.
Persons wishing to practice the invention should remember that other embodiments and variations can be adapted to particular circumstances. Even though one point of view is necessarily chosen in describing and defining the invention, this should not inhibit broader or related embodiments going beyond the semantic orientation of this ; application but falling within the spirit of the invention.
For example, those skilled in the art will appreciate the many variations in materials, structures, and method steps that can be made in putting the inventive method into practice.
.
' , :. :
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A weatherseal making method comprising:
(a) preparing a long, thin strip of pile material;
(b) cross-head extruding a resin base having a relatively thick, generally flat support portion formed on the back of said pile strip and a relatively thin portion U-shaped in cross section and joined to opposite side edge regions of o face surface of said support portion and arching over said pile strip;
(c) while said resin material is still plastic, producing a substantially lower pressure outside said U-shaped portion than inside said U-shaped portion to expand said U-shaped portion away from said support portion and reduce the thickness of the wall of said U-shaped portion; and (d) setting said resin material with said U-shaped portion expanded over said pile strip.
(a) preparing a long, thin strip of pile material;
(b) cross-head extruding a resin base having a relatively thick, generally flat support portion formed on the back of said pile strip and a relatively thin portion U-shaped in cross section and joined to opposite side edge regions of o face surface of said support portion and arching over said pile strip;
(c) while said resin material is still plastic, producing a substantially lower pressure outside said U-shaped portion than inside said U-shaped portion to expand said U-shaped portion away from said support portion and reduce the thickness of the wall of said U-shaped portion; and (d) setting said resin material with said U-shaped portion expanded over said pile strip.
2. A weatherseal comprising:
(a) a relatively thick, flat resin base formed as a long narrow strip;
(b) a long, narrow strip of pile material secured to one face surface of said resin base and extending along a longitudinal central region of said base; and (c) a relatively thin-walled resin portion, U-shaped in cross section, joined to opposite side edge regions of said one face surface of said support portion and arching over said strip of pile material.
(a) a relatively thick, flat resin base formed as a long narrow strip;
(b) a long, narrow strip of pile material secured to one face surface of said resin base and extending along a longitudinal central region of said base; and (c) a relatively thin-walled resin portion, U-shaped in cross section, joined to opposite side edge regions of said one face surface of said support portion and arching over said strip of pile material.
3. The weatherseal of claim 2 wherein said U-shaped portion is spaced away from said pile strip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA287,102A CA1064328A (en) | 1974-02-27 | 1977-09-20 | Weatherseal manufacture |
| CA318,708A CA1073748A (en) | 1974-02-27 | 1978-12-28 | Weatherseal manufacture |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US446301A US3923576A (en) | 1974-02-27 | 1974-02-27 | Weatherseal manufacture |
| CA217,611A CA1040371A (en) | 1974-02-27 | 1975-01-09 | Weatherseal manufacture |
| CA287,102A CA1064328A (en) | 1974-02-27 | 1977-09-20 | Weatherseal manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064328A true CA1064328A (en) | 1979-10-16 |
Family
ID=27163778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA287,102A Expired CA1064328A (en) | 1974-02-27 | 1977-09-20 | Weatherseal manufacture |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1064328A (en) |
-
1977
- 1977-09-20 CA CA287,102A patent/CA1064328A/en not_active Expired
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