US3877628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Webbers for the textile industry
Assignee: Individual
•
Filing: 1974-06-19
•
Granted: 1975-04-15
•
Expires: 1994-06-19
Abstract
Abstract A webber for folding a fleece delivered by a card to convert it into a web of different thickness from the fleece comprises a fleece feed system, first and second main carriages provided with rollers carrying two endless guide belts adapted to receive the fleece therebetween and move it along a loop-like path, drive means for linearly reciprocating the main carriages in parallel directions, drive means for moving the guide belts relative to the main carriages, a delivery belt for receiving the fleece leaving the guide belts, and drive means for driving the delivery belt along a linear path substantially perpendicular to the direction of movement of the main carriages. At least one auxiliary carriage is provided and comprises rollers carrying the guide belts, such auxiliary carriage being reciprocated in a direction parallel to the movement of the main carriages.
Inventors
- 👤 Robert Asselin
- 👤 Pierre Asselin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:48
CPC Classifications
D; D01; D01G; D01G25/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
245 words
A webber for folding a fleece delivered by a card to convert it into a web of different thickness from the fleece, the webber comprising: a fleece feed system; first and second main carriages; rollers on said first and second main carriages; first and second endless guide means carried on said rollers for receiving the fleece leaving said feed system and moving the fleece along a loop-like path; main carriage drive means operative to impart to said main carriages periodic linear reciprocations in parallel directions; guide drive means operative to impart to the guide means a speed of movement relative to said main carriages; a delivery belt arranged to receive the fleece leaving the guide means; and delivery drive means operative to impart to the delivery belt a continuous rectilinear motion in a direction substantially perpendicular to the direction of movement of said main carriages; in which webber the improvement comprises: at least one auxiliary carriage; rollers on said auxiliary carriage carrying said guide means; auxiliary carriage drive means operative to impart to said auxiliary carriage a periodic rectilinear reciprocation in a direction parallel to the direction of movement of said main carriages; said guide means comprising first and second continuous endless guide belts running on said rollers of said first and second main carriages and said auxiliary carriage; said rollers being so disposed that the loop-like path along which the fleece travels extends between portions of each of said first and second guide belts.
Claim 2
Dependent Claim
245 words
A webber for folding a fleece delivered by a card to convert it into a web of different thickness from the fleece, the webber comprising: a fleece feed system; first and second main carriages; rollers on said first and second main carriages; first and second endless guide means carried on said rollers for receiving the fleece leaving said feed system and moving the fleece along a loop-like path; main carriage drive means operative to impart to said main carriages periodic linear reciprocations in parallel directions; guide drive means operative to impart to the guide means a speed of movement relative to said main carriages; a delivery belt arranged to receive the fleece leaving the guide means; and delivery drive means operative to impart to the delivery belt a continuous rectilinear motion in a direction substantially perpendicular to the direction of movement of said main carriages; in which webber the improvement comprises: at least one auxiliary carriage; rollers on said auxiliary carriage carrying said guide means; auxiliary carriage drive means operative to impart to said auxiliary carriage a periodic rectilinear reciprocation in a direction parallel to the direction of movement of said main carriages; said guide means comprising first and second continuous endless guide belts running on said rollers of said first and second main carriages and said auxiliary carriage; said rollers being so disposed that the loop-like path along which the fleece travels extends between portions of each of said first and second guide belts.
Claim 3
Dependent Claim
20 words
A webber according to claim 1, comprising means for protecting said delivery belt from air eddies arising from carriage movements.
Claim 4
Dependent Claim
71 words
A webber according to claim 2, in which said means for protecting said delivery belt comprises bottom runs of said guide belts, said rollers being so disposed that said bottom runs are disposed substantially in a single plane parallel to said delivery belt, said runs co-operating to form a substantially continuous plane curtain extending above said delivery belt over a length at least equal to the width of said delivery belt.
Claim 5
Dependent Claim
45 words
A webber according to claim 1, comprising means for moving the fleece between its entry and exit without stretching or compressing it, and means for obtaining on said delivery belt a web which is of constant thickness at its edges as well as its centre.
Claim 6
Dependent Claim
38 words
A webber according to claim 4, in which said carriage drive means are operative to move the various parts of the guide belts at speeds such that the fleece and the guide belts move without stretching or compression.
Claim 7
Dependent Claim
88 words
A webber according to claim 5, in which: said main-carriage drive means are adapted to move said first main carriage at half the fleece feed speed when such carriage moves in the feed direction, and at the algebraic sum of the speeds of said second main carriage and half the fleece feed speed when the first main carriage moves in the opposite direction; and said delivery drive means is operative to move said delivery belt at a speed proportional to the absolute speed of said second main carriage.
Claim 8
Dependent Claim
37 words
A webber according to claim 6, in which said auxiliary carriage drive means is operative to drive said auxiliary carriage at a speed equal to the difference between the speeds of said second and first main carriages.
Claim 9
Dependent Claim
73 words
A webber according to claim 6, comprising a said auxiliary carriage for each of said first and second guide belts, said auxiliary carriage drive means being operative to drive one of such carriages at the same absolute speed as said first main carriage but in the opposite direction thereto, and to drive the other auxiliary carriage at a speed equal to the difference between the speeds of said second and first main carriages.
Claim 10
Dependent Claim
81 words
A webber according to claim 6, comprising first and second auxiliary carriages for said first guide belt and a third auxiliary carriage for said second guide belt, said auxiliary carriage drive means being operative to move said first auxiliary carriage at the same absolute speed as said second main carriage but in the opposite direction thereto, and for moving said second and third auxiliary carriages at the same absolute speed as said first main carriage but in the opposite direction thereto.
Claim 11
Dependent Claim
31 words
A webber according to claim 4, in which said means for obtaining a constant thickness web comprises means for changing the direction of main-carriage movement by the use of limited forces.
Claim 12
Dependent Claim
30 words
A webber according to claim 10, in which said main carriage drive means are so devised that the curve representing the variation of second main-carriage speed has no sharp point.
Claim 13
Dependent Claim
30 words
A webber according to claim 11, in which said main carriage drive means are so devised that the speed of said second main carriage is an odd periodic time function.
Claim 14
Dependent Claim
31 words
A webber according to claim 12, in which said main carriage drive means are so devised that the speed of said second main carriage is in a sinusoidal relationship with time.
Claim 15
Dependent Claim
113 words
A webber according to claim 12, in which said main carriage drive means are so devised that one of the alternations of the curve representing the speed w of said second main carriage plotted against time t comprises three adjacent parts defined as follows: when t is between 0 and pi /na, w wM (1-cos nat)/2; when t is between pi /na and (n-1) pi /na, w wM, and when t is between (n-1) pi /na and pi /a, w, wM(1 - (-1)n cos nat)/2, n denoting a positive integer, a corresponding to pi V/C, wM denoting nV/(n-1), C denoting the amplitude of second main-carriage travel, and V denoting the fleece feed speed.
Claim 16
Dependent Claim
58 words
A webber according to claim 1, comprising means for protecting the delivery belt from air eddies arising from carriage movements, means for moving the fleece between its entry and exit without stretching or compressing it and means for obtaining on the delivery belt a web which is of constant thickness at its edges as well as its centre.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |