Patent US1595038A successfully refreshed from Google Patents.
US3875855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strapping method
Assignee: Stanley Works
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Filing: 1973-04-09
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Granted: 1975-04-08
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Expires: 1993-04-09
Abstract
Abstract A fixed clamp and shear member is provided in a combination clamping, sealer and shearing device with a strap guide opening extending through the clamp and shear member adjacent a free end of that member serving as an abutment face which cooperates with a movable clamp for clamping a leading end of strap trained from a strap supply through the strap guide opening and into a loop about an article to be bound. A movable shear member is mounted for sliding movement on the fixed clamp and shear member and is reciprocable between a retracted position, wherein the strap guide opening is exposed for strap feeding and tensioning, and an extended position wherein the movable shear is in lapping relation to the strap guide opening of the fixed shear and clamping member to effect strap shearing. The movable clamp in its operative clamping position serves as a stop for the movable shear and establishes a seal pressing position for the movable shear intermediate its retracted and extended positions wherein the movable shear presses opposed heated strap surfaces into a fused seal after withdrawal of a pivotably supported heating element from between the strap surfaces and before the movable clamp is released to permit final movement of the shear member into its extended position to shear the strap in the strap guide opening from the strap supply.
Inventors
- 👤 Robert P Clark
- 👤 Robert Lee Haven
- 👤 Franz A Kneidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:14
CPC Classifications
B; B65; B65B; B65B13/00; B65B13/18; B65B13/24; B65B13/32; B65B13/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A method of binding an article with a length of heat sealable plastic strap comprising the steps of feeding the strap from a strap supply into a loop about the article with a leading end of the strap in spaced opposed lapping relation to a portion of the strap connected to the strap supply, clamping the strap adjacent its leading end, supporting the clamped leading end portion of the strap with a supporting member with the clamped leading end portion disposed between the supporting member and the lapping strap portion connected to the strap supply, tensioning the strap about the article, heating confronting surfaces of the lapping strap portions, sealing the heated strap surfaces by pressing the tensioned lapping strap portion connected to the strap supply into engagement with the clamped leading end portion of the strap, relaxing the strap between the sealed lapping strap portions and the strap supply while maintaining the sealed lapping portions pressed against the supporting member, and then shearing the sealed length of strap from the strap supply.
Claim 2
Independent Claim
173 words
A method of binding an article with a length of heat sealable plastic strap comprising the steps of feeding the strap from a strap supply into a loop about the article with a leading end of the strap in spaced opposed lapping relation to a portion of the strap connected to the strap supply, clamping the strap adjacent its leading end, supporting the clamped leading end portion of the strap with a supporting member with the clamped leading end portion disposed between the supporting member and the lapping strap portion connected to the strap supply, tensioning the strap about the article, heating confronting surfaces of the lapping strap portions, sealing the heated strap surfaces by pressing the tensioned lapping strap portion connected to the strap supply into engagement with the clamped leading end portion of the strap, relaxing the strap between the sealed lapping strap portions and the strap supply while maintaining the sealed lapping portions pressed against the supporting member, and then shearing the sealed length of strap from the strap supply.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein the clamping and supporting steps are effected simultaneously by the supporting member by moving the supporting member against the leading end portion of the strap and into clamping relation with a fixed member engaging the strap adjacent its leading end.
Claim 4
Independent Claim
225 words
A method of binding an article with a length of heat sealable plastic strap comprising the steps of feeding the strap from a strap supply through a strap guideway which includes a strap guide opening extending through a fixed clamp and shear member at a sealing station to form a loop of strap about the article, terminating strap feeding when a leading end portion of the strap is returned to the sealing station in confronting relation to a free end of the fixed clamp and shear member and in lapping spaced opposed relation to the strap trained through its strap guide opening, clamping the leading end portion of the strap by releasably securing a movable clamp in pressing engagement with the strap against the free end of the fixed clamp and shear member, heating the lapping spaced opposed surfaces of the strap, sealing the heated strap surfaces by pressing a movable shear against the strap trained through the strap guide opening of the fixed clamp and shear member to clamp and fuse the heated surfaces together between the movable shear and movable clamp, and shearing the strap from the strap supply by releasing the movable clamp to permit the movable shear to pass over the strap guide opening of the fixed clamp and shear member to cut the strap retained within its strap guide opening.
Claim 5
Independent Claim
225 words
A method of binding an article with a length of heat sealable plastic strap comprising the steps of feeding the strap from a strap supply through a strap guideway which includes a strap guide opening extending through a fixed clamp and shear member at a sealing station to form a loop of strap about the article, terminating strap feeding when a leading end portion of the strap is returned to the sealing station in confronting relation to a free end of the fixed clamp and shear member and in lapping spaced opposed relation to the strap trained through its strap guide opening, clamping the leading end portion of the strap by releasably securing a movable clamp in pressing engagement with the strap against the free end of the fixed clamp and shear member, heating the lapping spaced opposed surfaces of the strap, sealing the heated strap surfaces by pressing a movable shear against the strap trained through the strap guide opening of the fixed clamp and shear member to clamp and fuse the heated surfaces together between the movable shear and movable clamp, and shearing the strap from the strap supply by releasing the movable clamp to permit the movable shear to pass over the strap guide opening of the fixed clamp and shear member to cut the strap retained within its strap guide opening.
Claim 6
Dependent Claim
45 words
The method of claim 3 including a further step of tensioning the strap about the article after the clamping step by gripping a substantial length of strap upstream of the sealing station and pulling the strap in a direction opposite the direction of strap feeding.
Claim 7
Dependent Claim
19 words
The method of claim 4 wherein the heating and sealing steps are performed while maintaining the strap in tension.
Claim 8
Dependent Claim
28 words
The method of claim 5 including the step of releasing tension on the strap between the sealed strap surfaces and the strap supply after sealing but before shearing.
Claim 9
Dependent Claim
49 words
The method of claim 3 wherein the step of heating the lapping spaced opposed surfaces of the strap is provided by passing a heating element between the surfaces in good heat transfer relation to the strap surfaces but without contact engagement between the strap surfaces and the heating element.
Claim 10
Dependent Claim
34 words
The method of claim 7 wherein the clamping of the heated surfaces during sealing occurs substantially simultaneously with withdrawal of the heating element from between the strap surfaces to minimize cooling of the surfaces.
Claim 11
Dependent Claim
43 words
The method of claim 3 including the further step of releasing the sealed strap length onto the article by moving the movable clamp laterally of the path of movement of the movable shear after shearing the sealed strap length from the strap supply.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |