US3873387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strap loop securing and severing means
Assignee: Illinois Tool Works Inc
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Filing: 1973-07-05
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Granted: 1975-03-25
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Expires: 1993-07-05
Abstract
Abstract Method and apparatus for securing plastic strapping about an article includes forming a friction welded joint in overlapping portions of the strapping looped about the article and severing the loop from a supply of strapping by rapidly flexing the strapping adjacent the joint during the friction welding operation. The rapid flexing causes the strapping to fail by fatigue.
Inventors
- 👤 Jerry M Schoening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C65/00; B29C65/02; B29C65/06; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/432; B29C66/4322; B29C66/4324; B29C66/49; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81433; B29C66/81435; B29C66/816; B29C66/8161; B29C66/82; B29C66/822; B29C66/8221; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C65/0609; B29C65/0618; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/727; B29L2031/7276; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
The method of securing a loop of plastic strapping anD severing the loop from a supply of strapping comprising overlapping an end portion of the strapping with a second portion which is between the end portion and the supply, pressing an area of the second portion against the end portion, rubbing said area of the second portion rapidly back and forth against and longitudinally of the end portion to cause the rubbed together faces of the strapping to melt, causing the second portion of the strapping to bend sharply transversely thereof about a predetermined line between said area and the supply of strapping every time said area is rubbed back and forth whereby the strapping is caused to fail in fatigue and be severed along the predetermined line, stopping the rubbing action and continuing to press the rubbed together faces together until they fuse.
Claim 2
Independent Claim
144 words
The method of securing a loop of plastic strapping anD severing the loop from a supply of strapping comprising overlapping an end portion of the strapping with a second portion which is between the end portion and the supply, pressing an area of the second portion against the end portion, rubbing said area of the second portion rapidly back and forth against and longitudinally of the end portion to cause the rubbed together faces of the strapping to melt, causing the second portion of the strapping to bend sharply transversely thereof about a predetermined line between said area and the supply of strapping every time said area is rubbed back and forth whereby the strapping is caused to fail in fatigue and be severed along the predetermined line, stopping the rubbing action and continuing to press the rubbed together faces together until they fuse.
Claim 3
Dependent Claim
64 words
The method set forth in claim 1 wherein the bending of the second portion of the strapping along the predetermined line is brought about by causing the strapping to alternately bulge and straighten over a relatively short distance between the said area of the second portion and the supply and by providing a sharp edge about which the strap bends to form the bulge.
Claim 4
Dependent Claim
30 words
The method set forth in claim 1 wherein the predetermined line about which the strapping is bent is located directly adjacent said area of the second portion of the strapping.
Claim 5
Dependent Claim
146 words
Apparatus for securing a loop of plastic strapping about an article and severing the loop from a supply of strapping comprising a device for pressing overlapping portions of the strapping together and rubbing the upper portion against the lower portion with a back and forth motion to melt the rubbed together faces of the strapping, said device being operable to hold the melted faces together until they fuse, means located between said device and the supply of strapping for preventing the upper portion of the strapping from moving therepast in the direction of the supply whereby the strapping alternately bulges and flattens between said means and said device as said device moves back and forth, and means causing the strapping to bend sharply about a predetermined line transversely thereof as the strapping bulges and flattens whereby the strapping becomes severed by fatigue along said predetermined line.
Claim 6
Dependent Claim
146 words
Apparatus for securing a loop of plastic strapping about an article and severing the loop from a supply of strapping comprising a device for pressing overlapping portions of the strapping together and rubbing the upper portion against the lower portion with a back and forth motion to melt the rubbed together faces of the strapping, said device being operable to hold the melted faces together until they fuse, means located between said device and the supply of strapping for preventing the upper portion of the strapping from moving therepast in the direction of the supply whereby the strapping alternately bulges and flattens between said means and said device as said device moves back and forth, and means causing the strapping to bend sharply about a predetermined line transversely thereof as the strapping bulges and flattens whereby the strapping becomes severed by fatigue along said predetermined line.
Claim 7
Dependent Claim
56 words
The apparatus set forth in claim 4 wherein said last mentioned means comprises a corner of at least 90* on said device, said corner being engaged with the upper portion of the strapping on the side of said device facing the means for preventing the strapping from moving therepast in the direction of the strapping supply.
Claim 8
Dependent Claim
54 words
The apparatus set forth in claim 5 wherein the means for preventing the strapping from moving therepast in the direction of the strapping supply comprises a pivotably mounted dog having a rounded corner facing said device whereby the bulging of the strapping does not produce a sharp bend at the corner of said dog.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |