US3554247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for trimming articles of varying widths
Assignee: MacMillan Bloedel Ltd
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Filing: 1968-12-05
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Granted: 1971-01-12
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Expires: 1988-12-05
Abstract
Abstract Automatic apparatus for trimming shingles, shakes, and other articles of varying widths to produce true sides thereon and including a carriage supporting a trimming head with means for moving the carriage towards and away from the path along which the articles are moved, a follower arm having an end biased towards the path and engaged by sides of the article moving therealong, said arm being shifted to a position determined by the width of the article engaged thereby and through an electrical system causing the carriage to be shifted to position the trimming head so as to be able to trim or make true the side of this article.
Inventors
- 👤 Arild Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
B; B27; B27M; B27M3/00; B27M3/02; B23; B23C; B23C3/00; B23C3/12; B27C; B27C1/00; B27C1/08; Y; Y10; Y10T; Y10T83/00; Y10T83/525; Y10T83/538
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
227 words
Automatic apparatus for trimming articles, such as shingles and shakes, of varying widths to produce true sides thereon, comprising a carriage at the side of a path along which said articles are moved and mounted for movement towards and away therefrom, power means connected to the carriage operable selectively to move the carriage towards and away from the path, a trimming head mounted on the carriage, a conveyor for moving said articles along the path past the trimming head, a swingably mounted follower arm having an end biased towards the path and ahead of the trimming head with reference to the direction of movement of the articles, an electrical contact on the arm, a switch operated after said each article has engaged the arm, electrical circuit means including said switch and said contact adapted to operate said power means to shift the carriage and to cause the trimming head thereon to trim the article to a width determined by the position of said arm end, and separated first and second contact plates on the carriage and forming part of said circuit means, said arm contact engaging the first plate when the arm swings towards the path to cause the carriage to move in the same direction and engaging the second plate when swinging away from said path to cause the carriage to move away from the latter.
Claim 2
Dependent Claim
227 words
Automatic apparatus for trimming articles, such as shingles and shakes, of varying widths to produce true sides thereon, comprising a carriage at the side of a path along which said articles are moved and mounted for movement towards and away therefrom, power means connected to the carriage operable selectively to move the carriage towards and away from the path, a trimming head mounted on the carriage, a conveyor for moving said articles along the path past the trimming head, a swingably mounted follower arm having an end biased towards the path and ahead of the trimming head with reference to the direction of movement of the articles, an electrical contact on the arm, a switch operated after said each article has engaged the arm, electrical circuit means including said switch and said contact adapted to operate said power means to shift the carriage and to cause the trimming head thereon to trim the article to a width determined by the position of said arm end, and separated first and second contact plates on the carriage and forming part of said circuit means, said arm contact engaging the first plate when the arm swings towards the path to cause the carriage to move in the same direction and engaging the second plate when swinging away from said path to cause the carriage to move away from the latter.
Claim 3
Dependent Claim
52 words
Automatic trimming apparatus as claimed in claim 1 including a third contact plate on the carriage between the first and second plates and forming part of said circuit means, and means for slowing the movement of the carriage away from the path when the third plate is engaged by the arm contact.
Claim 4
Dependent Claim
20 words
Automatic trimming apparatus as claimed in claim 1 in which said contact is a ball rotatably mounted on the arm.
Claim 5
Dependent Claim
32 words
Automatic trimming apparatus as claimed in claim 1 including a nonconducting strip between said plates to break the circuit means to stop the carriage movement when said strip engages the arm contact.
Claim 6
Dependent Claim
24 words
Automatic trimming apparatus as claimed in claim 4 in which said contact is in the form of a ball rotatably mounted on the arm.
Claim 7
Dependent Claim
51 words
Automatic trimming apparatus as claimed in claim 4 in which the power means comprises a fluid-operated cylinder having a connecting rod projecting therefrom and connected to the carriage, and means operated by said circuit means for selectively directing fluid under pressure to ends of the cylinder to move the piston therein.
Claim 8
Dependent Claim
69 words
Automatic trimming apparatus as claimed in claim 6 including first and second valves for controlling the flow of fluid to the opposite ends of the cylinder, electrical means forming part of said circuit means for operating the first valve and in circuit with the first contact plate, and electrical means forming part of said circuit means for operating the second valve and in circuit with the second contact plate.
Claim 9
Dependent Claim
205 words
Automatic apparatus for trimming articles, such as shingles and shakes, of varying widths to produce true sides thereon, comprising a carriage at the side of a path along which said articles are moved and mounted for movement towards and away therefrom, power means connected to the carriage operable selectively to move the carriage towards and away from the path, a trimming head mounted on the carriage, a conveyor for moving said articles along the path past the trimming head, a swingably mounted follower arm having an end biased towards the path and ahead of the trimming head with reference to the direction of movement of the articles, an electrical contact on the arm, a switch, means for operating said switch after said each article has engaged the arm and has moved a predetermined distance thereafter, electrical circuit means including said switch and said contact adapted to operate said power means before said each article reaches the trimming head and when said switch is operated to shift the carriage so that said trimming head when reached by said each article is in position to trim the latter to a width determined by the position of said arm end when the article had moved said predetermined distance.
Claim 10
Dependent Claim
205 words
Automatic apparatus for trimming articles, such as shingles and shakes, of varying widths to produce true sides thereon, comprising a carriage at the side of a path along which said articles are moved and mounted for movement towards and away therefrom, power means connected to the carriage operable selectively to move the carriage towards and away from the path, a trimming head mounted on the carriage, a conveyor for moving said articles along the path past the trimming head, a swingably mounted follower arm having an end biased towards the path and ahead of the trimming head with reference to the direction of movement of the articles, an electrical contact on the arm, a switch, means for operating said switch after said each article has engaged the arm and has moved a predetermined distance thereafter, electrical circuit means including said switch and said contact adapted to operate said power means before said each article reaches the trimming head and when said switch is operated to shift the carriage so that said trimming head when reached by said each article is in position to trim the latter to a width determined by the position of said arm end when the article had moved said predetermined distance.
Claim 11
Dependent Claim
80 words
Automatic trimming apparatus as claimed in claim 8 including separated first and second contact plates on the carriage and forming part of said circuit means, said arm contact engaging the first plate when the arm swings towards the path to cause the carriage when said switch is operated to move in the same direction and engaging the second plate when swinging away from said path to cause the carriage when said switch is operated to move away from the path.
Claim 12
Dependent Claim
52 words
Automatic trimming apparatus as claimed in claim 9 including a third contact plate on the carriage between the first and second plates and forming part of said circuit means, and means for slowing the movement of the carriage away from the path when the third plate is engaged by the arm contact.
Claim 13
Dependent Claim
32 words
Automatic trimming apparatus as claimed in claim 9 including a nonconducting strip between said plates to break the circuit means to stop the carriage movement when said strip engages the arm contact.
Claim 14
Dependent Claim
51 words
Automatic trimming apparatus as claimed in claim 11 in which the power means comprises a fluid-operated cylinder having a connecting rod projecting therefrom and connected to the carriage and means operated by said circuit means for selectively directing fluid under pressure to ends of the cylinder to move the piston therein.
Claim 15
Dependent Claim
69 words
Automatic trimming apparatus as claimed in claim 12 including first and second valves for controlling the flow of fluid to the opposite ends of the cylinder, electrical means forming part of said circuit means for operating the first valve and in circuit with the first contact plate, and electrical means forming part of said circuit means for operating the second valve and in circuit with the second contact plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |