US3835756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag-making machine
Assignee: Windmoeller and Hoelscher KG
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Filing: 1973-10-04
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Granted: 1974-09-17
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Expires: 1993-10-04
Abstract
Abstract In the manufacture of carrier bags, a continuously travelling web of bag-making material is provided at intervals with carrier handles which are stuck thereto by means of reinforcing sheets. The reinforcing sheets are successively fed to a rotary transfer drum with which the web of bag-making material is in contact. The reinforcing sheets are coated with adhesive on one side. During rotation of the transfer drum, and before each reinforcing sheet makes contact with the web of bag-making material, a carrying handle is fed to the transfer drum at the location where a reinforcing sheet is being held on it. To enable the pitch of the carrying handles on the web to be varied without changing the transfer drum, the latter is turned by variable gearing.
Inventors
- 👤 F Bosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/86; B31B70/864; B31B2160/00; B31B2160/10; B31B50/00; B31B50/74; B31B50/81; B31B50/812; B31B50/8122; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/133; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1734
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
350 words
In the manufacture of carrier bags, a machine operative in cycles for successively adhering handles at intervals along a travelling web of bag-making material with the aid of individual reinforcing sheets which are each provided with adhesive on one side, said machine comprising first means for successively feeding said reinforcing sheets at a first supply station substantially tangentially to a rotary transfer drum which is contacting said web at a transfer station, a holder mounted on said drum and adapted to hold one of the reinforcing sheets on the drum during rotation thereof, further means for successively feeding said handles at a second supply station substantially tangentially to the same said transfer drum at a location where a reinforcing sheet is being held, whereby the handle becomes stuck to the reinforcing sheet held by the holder, and variable gearing for rotating said transfer drum such that, when the said holder thereon is passing through the first and second supply stations, the drum is turned at a mean peripheral speed which is proportional to the machine cycle and conforms to the tangential feeding speeds of the reinforcing sheets and handles at the supply stations and, when said holder is passing through the transfer station for transfer of the reinforcing sheet and handle to the web, the drum is turned at a peripheral speed which is equal to the speed of web travel and proportional to said intervals and, when the said holder is passing through an intermediate arcuate path portion between the said first and second stations, the drum is turNed at a compensating peripheral speed which is different from the mean speed and is calculated so that the product of the difference between the web travel and mean peripheral speeds and the arc transcribed by the holder while the drum speed differs from the mean speed in favour of the web travel speed is equal to the negative product of the difference between the compensating and mean speeds and the arc transcribed by the holder while the drum speed differs from the mean speed in favour of the compensating speed.
Claim 2
Dependent Claim
350 words
In the manufacture of carrier bags, a machine operative in cycles for successively adhering handles at intervals along a travelling web of bag-making material with the aid of individual reinforcing sheets which are each provided with adhesive on one side, said machine comprising first means for successively feeding said reinforcing sheets at a first supply station substantially tangentially to a rotary transfer drum which is contacting said web at a transfer station, a holder mounted on said drum and adapted to hold one of the reinforcing sheets on the drum during rotation thereof, further means for successively feeding said handles at a second supply station substantially tangentially to the same said transfer drum at a location where a reinforcing sheet is being held, whereby the handle becomes stuck to the reinforcing sheet held by the holder, and variable gearing for rotating said transfer drum such that, when the said holder thereon is passing through the first and second supply stations, the drum is turned at a mean peripheral speed which is proportional to the machine cycle and conforms to the tangential feeding speeds of the reinforcing sheets and handles at the supply stations and, when said holder is passing through the transfer station for transfer of the reinforcing sheet and handle to the web, the drum is turned at a peripheral speed which is equal to the speed of web travel and proportional to said intervals and, when the said holder is passing through an intermediate arcuate path portion between the said first and second stations, the drum is turNed at a compensating peripheral speed which is different from the mean speed and is calculated so that the product of the difference between the web travel and mean peripheral speeds and the arc transcribed by the holder while the drum speed differs from the mean speed in favour of the web travel speed is equal to the negative product of the difference between the compensating and mean speeds and the arc transcribed by the holder while the drum speed differs from the mean speed in favour of the compensating speed.
Claim 3
Dependent Claim
44 words
A machine according to claim 1, wherein two said holders are mounted on the transfer drum at diametrally opposite positions, the said first and second supply stations and transfer station being disposed about a peripheral portion of the drum subtending no more than 180*.
Claim 4
Dependent Claim
106 words
A machine according to claim 1 or claim 2, wherein the variable gearing comprises planet gearing comprising an input member driven at a constant angular speed proportional to the cycle rate of the machine, an output member positively connected to the transfer drum, and a superposed member driven by a drive capable of executing an operating cycle whenever the or each holder on the transfer drum passes a fixed point, the operating cycle imparted to the superposed member being composed of the phases: standstill, acceleration, constant angular speed, deceleration in one direction of rotation, standstill, acceleration, constant angular speed, deceleration in the opposite direction of rotation.
Claim 5
Dependent Claim
142 words
A machine according to claim 3, wherein the drive comprises a four-part linkage having two rocker arms pivotable about respective fixed points and a coupling member interconnecting the two rocker arms, the said drive being operated by a cam connected to an input gear which turns at a rate proportional to the cycle rate of the machine, the cam being operatively coupled to one of the rocker arms, the input gear being connected to the input member of the planet gearing, and the other rocker arm being positively connected to the superposed member, and wherein the supply stations are disposed adjacent peripheral positions of the transfer drum at which the superposed member is at a standstill and the transfer station is disposed adjacent a peripheral position of the transfer drum at which a constant angular speed is imparted to the superposed member.
Claim 6
Dependent Claim
31 words
A machine according to claim 4, wherein the input member comprises a set of central gears, the output member comrpises a central gear, and the superposed member is the planet carrier.
Claim 7
Dependent Claim
20 words
A machine according to claim 4 or claim 5, wherein the coupling ratio between the two rocker arms is variable.
Claim 8
Dependent Claim
54 words
A machine according to claim 6, wherein the one rocker arm that is coupled to the cam comprises a groove extending through the fixed pivot point of the said one rocker arm, the groove containing a slide block which can be clamped therein and which is provided with a pivot for the coupling member.
Claim 9
Dependent Claim
25 words
A machine according to claim 7, wherein the groove is arcuate and has a radius of curvature defined by the length of the coupling member.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |