US3797368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary bag making apparatus
Assignee: Individual
•
Filing: 1971-07-23
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Granted: 1974-03-19
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Expires: 1991-07-23
Abstract
Abstract A rotary bag making apparatus of the type used to fabricate bags from a continuous web of thermoplastic film material is described. The apparatus comprises a smooth feed cylinder driven at a constant velocity and adapted to feed the web material past an operating station and a sealing cylinder having a sealing member adapted to engage the web at spaced intervals during each revolution thereof, the web being heat sealed at such spaced locations between the smooth cylinder and the sealing member. Means in the form of non-circular gearing are provided for rotating the sealing cylinder at a constant RPM with a cyclically varying instantaneous angular velocity. The non-circular gearing means rotates the sealing cylinder through a drive shaft and means are provided for adjusting the angular position of the sealing cylinder relative to that drive shaft whereby the instantaneous angular velocity of the sealing member at the moment of sealing engagement with the web may be adjusted. Bag length is adjusted by changing the RPM of the sealing cylinder relative to the smooth feed cylinder, and means are provided for automatically and simultaneously adjusting the angular position of the sealing cylinder on the drive shaft by a proper amount to maintain the velocity of the sealing member equal to the velocity of the web at the moment of engagement between the two.
Inventors
- 👤 F Martelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:56
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/83; B29C66/834; B29C66/8351; B29C66/83511; B29C65/00; B29C65/02; B29C65/18; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/8341; B29C66/83411; B29C66/83415; B29C66/84; B29C66/841; B29C66/8412; B29C66/851; B29C66/8511; B29C66/90; B29C66/93; B29C66/934; B29C66/93431; B29C66/93441; B29C66/93451; B29C66/939; B31; B31B; B31B2155/00; B31B2155/003; B31B70/00; B31B70/74; B31B70/92; B31B70/94; B31B70/946; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4693; Y10T83/4737; Y10T83/4766; Y10T83/4775
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
252 words
A rotary web material working apparatus adapted to operate on web material at spaced intervals therealong comprising an operating station, feed means adapted to feed said web material past said operating station, variable speed web drive means adapted to drive said web feed means at an adjustable speed thereby to adjust the velocity of said web material, operating means comprising an operating member, a variable speed operating member drive meanS operatively drivingly connected to said operating member for moving same in a cyclical manner at an adjustable frequency, said operating member engaging said web while moving in the direction of web feed once during each operating cycle, adjustable control means operatively connected to said web drive means and to said operating member drive means for simultaneously controlling web speed and operating member frequency and effective to vary the ratio therebetween, and means to vary the instantaneous velocity of said operating member at the moment of engagement with said web material at said operating station, manual adjusting means operatively connected to said control means, to said operating member and to said instantaneous velocity varying means and effective to simultaneously adjust all three in a manner maintaining the velocity of said operating member and said web equal at the moment of engagement between the two, whereby the spacing of said operations on said web material and the speed of operation may be varied without causing slippage between said operating member and said web material or tearing of said web material at said operating station.
Claim 2
Dependent Claim
252 words
A rotary web material working apparatus adapted to operate on web material at spaced intervals therealong comprising an operating station, feed means adapted to feed said web material past said operating station, variable speed web drive means adapted to drive said web feed means at an adjustable speed thereby to adjust the velocity of said web material, operating means comprising an operating member, a variable speed operating member drive meanS operatively drivingly connected to said operating member for moving same in a cyclical manner at an adjustable frequency, said operating member engaging said web while moving in the direction of web feed once during each operating cycle, adjustable control means operatively connected to said web drive means and to said operating member drive means for simultaneously controlling web speed and operating member frequency and effective to vary the ratio therebetween, and means to vary the instantaneous velocity of said operating member at the moment of engagement with said web material at said operating station, manual adjusting means operatively connected to said control means, to said operating member and to said instantaneous velocity varying means and effective to simultaneously adjust all three in a manner maintaining the velocity of said operating member and said web equal at the moment of engagement between the two, whereby the spacing of said operations on said web material and the speed of operation may be varied without causing slippage between said operating member and said web material or tearing of said web material at said operating station.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1, wherein said operating member is adapted to move in a cyclical path engaging said web at a given location on said path during each operating cycle.
Claim 4
Dependent Claim
11 words
The apparatus of claim 2, wherein said cyclical path is endless.
Claim 5
Dependent Claim
41 words
The apparatus of claim 2, wherein said endless path is generally circular, said operating member being mounted for revolution about a given axis, said frequency varying means comprising means to vary the time rate of complete revolutions of said operating member.
Claim 6
Dependent Claim
53 words
The apparatus of claim 3, wherein said operating member drive means comprises a rotary member, means to rotate said rotary member at an angular velocity which varies along the rotary path, and wherein said instantaneous velocity varying means comprise means angularly adjustably mounting said operating member on said rotary member for movement therewith.
Claim 7
Dependent Claim
67 words
The apparatus of claim 2, wherein said instantaneous velocity varying means comprises means to periodically vary the instantaneous velocity of said operating member along said cyclical path during each operating cycle, means to adjust the location along said cyclical path at which said operating member engages said web, thereby to adjust the instantaneous velocity of said operating member at the moment of engagement with said web material.
Claim 8
Dependent Claim
11 words
The apparatus of claim 6, wherein said cyclical path is endless.
Claim 9
Dependent Claim
41 words
The apparaus of claim 7, wherein said endless path is generally circular, said operating member being mounted for revolution about a given axis, said frequency varying means comprising means to vary the time rate of complete revolutions of said operating member.
Claim 10
Dependent Claim
54 words
The apparatus of claim 8, wherein said drive operating member means comprises a rotary member, means to rotate said rotary member, and means mounting said operating member on said rotary member for movement therewith, said location adjusting means comprising means to adjust the angular position of said operating member relative to said rotary member.
Claim 11
Dependent Claim
76 words
The apparatus of claim 9, wherein said operating member drive means comprises a rotary drive member adapted to rotate at a constant angular speed, said means to vary the instantaneous velocity of said operating member along said cyclical path comprising non-circular gearing means operatively drivingly connected between said drive member and said rotary member and effective to convert said constant angular velocity of said drive member into a periodically varying angular velocity of said rotary member.
Claim 12
Dependent Claim
16 words
The apparatus of claim 10, wherein said non-circular gearing means comprises a pair of elliptical gears.
Claim 13
Dependent Claim
65 words
The apparatus of claim 9, wherein said web feed means comprises a second rotary member, a second rotary drive means operatively connected to said second rotary member and effective to rotatably drive same, and wherein sAid control means comprises means operatively connected to said first and second rotary drive means and effective to simultaneously vary the relative rate of complete rotations of said rotary members.
Claim 14
Dependent Claim
66 words
The apparatus of claim 12, wherein said instantaneous velocity varying means comprises means to periodically vary the instantaneous velocity of said operating member along said cyclical path during each operating cycle, means to adjust the location along said cyclical path at which said operating member engages said web, thereby to adjust the velocity of said operating member at the moment of engagement with said web material.
Claim 15
Dependent Claim
66 words
The apparatus of claim 13, wherein said drive operating member means comprises a rotary drive member adapted to rotate at a constant angular speed, said relative velocity varying means comprising, non-circular gearing means operatively drivingly connected between said drive member and said rotary member and effective to convert said constant angular velocity of said drive member into a periodically varying angular velocity of said rotary member.
Claim 16
Dependent Claim
74 words
The apparatus of claim 10, further comprising means operatively connected to said angular position adjusting means and to said control means and effective to automatically actuate said angular position adjusting means in response to a variation in the rate of complete revolutions of said operating member relative to said web velocity thereby to adjust the position of said operating member such that it engages said web at a velocity equal to the web velocity.
Claim 17
Dependent Claim
76 words
The apparatus of claim 15, wherein said operating member drive means comprises a rotary drive member adapted to rotate at a constant angular speed, said means to vary the instantaneous velocity of said operating member along said cyclical path comprising non-circular gearing means operatively drivingly connected between said drive member and said rotary member and effective to convert said constant angular velocity of said drive member into a periodially varying angular velocity of said rotary member.
Claim 18
Dependent Claim
16 words
The apparatus of claim 16, wherein said non-circular gearing means comprises a pair of elliptical gears.
Claim 19
Dependent Claim
70 words
The apparatus of claim 10, wherein said manual adjusting means further comprises a rotary control shaft effective to control the speed of said web and said operating member drive means, a manually actuatable control member and first cam means operatively connected between said control shaft and said control member and effective to rotate said control shaft by an amount which is a function of the position of said control member.
Claim 20
Dependent Claim
16 words
The apparatus of claim 18, wherein said non-circular gearing means comprises a pair of elliptical gears.
Claim 21
Dependent Claim
74 words
The apparatus of claim 18, further comprising means operatively connected to said angular position adjusting means and to said control means and effective to automatically actuate said angular position adjusting means in response to a variation in the rate of complete revolutions of said operating member relative to said web velocity thereby to adjust the position of said operating member such that it engages said web at a velocity equal to the web velocity.
Claim 22
Dependent Claim
64 words
The apparatus of claim 20, further comprsing a second cam means operatively connected to said control member, and wherein said means for actuating said adjusting means is operatively connected to said second cam means and effective to actuate said adjusting means to adjust the angular position of said operating means by an amount which is a function of the position of said control member.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |