Patent US3853671A successfully refreshed from Google Patents.
US3853671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making multiple plastic bags with reclosable fastener thereon
Assignee: Individual
•
Filing: 1972-07-25
•
Granted: 1974-12-10
•
Expires: 1992-07-25
Abstract
Abstract A mechanism and method for making material for multiple plastic bags with reclosable fasteners thereon, including either continuously supplying a flattened plastic film tube and cutting a strip from the front wall to expose the rear wall or supplying a flattened film sheet and folding back both ends so as to leave a central exposed section and applying a rear fastener strip to the rear wall or exposed section of the film and applying front fastener strips to the edges of the front wall or folded ends of the film, positioning an anvil within the film and simultaneously applying high speed continuous heat sealing means such as ultrasonic sealing horns to the web portions of the fastener strips and film to form a seal, and thereafter joining the front fastener strips to the rear fastener strip and rolling the material on a supply roll for later cutting the bags down the center of the rear fastener strip, or else continuously supplying a flat film sheet and guiding one or more sets of fastener strips to the surface of said film sheet, positioning an anvil below said film and simultaneously applying high speed continuous heat sealing means, such as an ultrasonic sonic process, to the surface of the web portions of the fastener strips and film sheet to form a continuous seal, and joining and cutting between the fastener strips as required, and cross cutting the assembly to form a series of bags.
Inventors
- 👤 S Ausnit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:12
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/84; B29C66/851; B29C66/8511; B29C37/00; B29C37/0078; B29C37/0082; B29C65/00; B29C65/02; B29C65/08; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7894; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/47; B29C66/474; B29C66/70; B29C66/72; B29C66/723; B29C66/7234; B29C66/72341; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/8145; B29C66/81463; B29C66/81469; B29C66/83; B29C66/836; B29C66/843; B29C66/8432; B29C2793/00; B29C66/90; B29C66/95; B29C66/951; B29C66/9512; B29C66/9513; B29L; B29L2005/00; B29L2031/00; B29L2031/712; B29L2031/7128; B29L2031/727; B29L2031/7282; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/813; B31B70/8131; B31B70/8132; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/38; Y10S24/39; Y10S24/50; Y10T; Y10T24/00; Y10T24/45; Y10T24/45152; Y10T24/45157; Y10T24/45168; Y10T428/00; Y10T428/16; Y10T428/169; Y10T428/24; Y10T428/24008; Y10T428/24017
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
A MECHANISM FOR MAKING MULTIPLE PLASTIC BAGS WITH RECLOSABLE FASTENERS THEREON COMPRISING: MEANS FOR CONTINUOUSLY SUPPLYING FLAT TUBULAR PLASTIC FILM; MEANS FOR FORMING A CONTINUOUS OPENING IN THE UPPER LAYER OF THE FILM WITH THE EDGES OF THE OPENING FORMING THE UPPER EDGES OF FRONT WALLS OF BAGS TO BE MADE FROM THE FILM, THE PORTION BENEATH THE UPPER BAG EDGES FORMING THE REAR WALL OF THE BAGS; MEANS FOR FEEDING A REAR CONTINUOUS FASTENER STRIP HAVING A WEB PORTION BETWEEN THE EDGES THROUGH THE OPENING AND AGAINST THE REAR WALL OF THE FILM; MEANS FOR ACCURATELY POSITIONING WEB PORTIONS OF FIRST AND SECOND FRONT FASTENER STRIPS AGAINST SAID UPPER BAG EDGES OF THE FILM PORTION; FIRST AND SECOND CONTINUOUS HIGH SPEED HEAT SEALING MEANS ATTACHING SAID WEB PORTIONS OF SAID FIRST AND SECOND STRIPS TO THE FILM; AND THIRD CONTINUOUS HIGH SPEED HEAT SEALING MEANS ATTACHING THE WEB PORTION OF THE REAR STRIP TO THE REAR WALL OF THE FILM.
Claim 2
Dependent Claim
161 words
A MECHANISM FOR MAKING MULTIPLE PLASTIC BAGS WITH RECLOSABLE FASTENERS THEREON COMPRISING: MEANS FOR CONTINUOUSLY SUPPLYING FLAT TUBULAR PLASTIC FILM; MEANS FOR FORMING A CONTINUOUS OPENING IN THE UPPER LAYER OF THE FILM WITH THE EDGES OF THE OPENING FORMING THE UPPER EDGES OF FRONT WALLS OF BAGS TO BE MADE FROM THE FILM, THE PORTION BENEATH THE UPPER BAG EDGES FORMING THE REAR WALL OF THE BAGS; MEANS FOR FEEDING A REAR CONTINUOUS FASTENER STRIP HAVING A WEB PORTION BETWEEN THE EDGES THROUGH THE OPENING AND AGAINST THE REAR WALL OF THE FILM; MEANS FOR ACCURATELY POSITIONING WEB PORTIONS OF FIRST AND SECOND FRONT FASTENER STRIPS AGAINST SAID UPPER BAG EDGES OF THE FILM PORTION; FIRST AND SECOND CONTINUOUS HIGH SPEED HEAT SEALING MEANS ATTACHING SAID WEB PORTIONS OF SAID FIRST AND SECOND STRIPS TO THE FILM; AND THIRD CONTINUOUS HIGH SPEED HEAT SEALING MEANS ATTACHING THE WEB PORTION OF THE REAR STRIP TO THE REAR WALL OF THE FILM.
Claim 3
Dependent Claim
32 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 1 wherein said continuous heat sealing means is in the form of ultrasonic plastic sealers.
Claim 4
Dependent Claim
153 words
A mechanism for making material for multiple plastic bags with reclosable fasteners comprising means for supplying plastic film having a continuous portion for forming the rear wall of bags and having edge portions extending towArd each other over said continuous portion for forming the upper edges of front walls of bags; means for positioning a rear continuous fastener strip having a center web portion between said edge portions and against the rear wall; means for positioning web portions of first and second front continuous fastener strips respectively against said first and second edge portions; at least two continuous heat sealing heads positioned for continuous joining of the web portions of the front fastener strips to said upper bag edges and a third heat sealing head for joining the web portion of the rear fastener strip to the rear wall portion of the film; and means for moving said film continuously past said heads.
Claim 5
Dependent Claim
153 words
A mechanism for making material for multiple plastic bags with reclosable fasteners comprising means for supplying plastic film having a continuous portion for forming the rear wall of bags and having edge portions extending towArd each other over said continuous portion for forming the upper edges of front walls of bags; means for positioning a rear continuous fastener strip having a center web portion between said edge portions and against the rear wall; means for positioning web portions of first and second front continuous fastener strips respectively against said first and second edge portions; at least two continuous heat sealing heads positioned for continuous joining of the web portions of the front fastener strips to said upper bag edges and a third heat sealing head for joining the web portion of the rear fastener strip to the rear wall portion of the film; and means for moving said film continuously past said heads.
Claim 6
Dependent Claim
35 words
A mechanism for making material for multiple plastic bags with reclosable fasteners in accordance with claim 3 wherein said front and rear heat sealing heads are in opposing relationship and an anvil is positioned therebetween.
Claim 7
Dependent Claim
55 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 3 and including an anvil positioned so that the film passes thereover, and said sealing heads including ultrasonic sealing horns opposite the web portion of the fastener strips sealing the web portion to the film against said anvil.
Claim 8
Dependent Claim
133 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 3 and including a main anvil positioned to be located beneath said edges of the front wall of the film, an opening in the anvil intermediate the side edges thereof, a lower anvil beneath the back wall portion of the film opposite said opening, said sealing heads including an ultrasonic sealing means including a pair of horns for sealing the web portions of the front fastener strips to the edges of the front film wall against the main anvil and including a horn engagable with the web portion of the rear film through said opening and sealing said web portion of the rear fastener strips to the rear wall of the film against said lower anvil.
Claim 9
Dependent Claim
43 words
A mechanism for making material for multiple plastic bags with reclosable fasteners thereon constructed in accordance with claim 6 and including a pair of rolls positioned downstream from said anvil pressing the front fastener strips against the rear fastener strips to interlocking engagement.
Claim 10
Dependent Claim
46 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 6 and including a roller positioned to coact with said lower anvil for pressing the front wall fastener strips against the rear wall fastener strip to interengage said strips.
Claim 11
Dependent Claim
37 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 6 and including slot means in said main anvil for guiding said strips to a position relative to said film.
Claim 12
Dependent Claim
28 words
A mechanism for making material for multiple bags with reclosable fasteners constructed in accordance with claim 8 and including adjustable fastener retaining guides receiving and guiding the strips.
Claim 13
Dependent Claim
42 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 3 and including anvil means positioned opposite each of the sealing heads for continuous joining of the front fastener strips and the rear fastener strip.
Claim 14
Dependent Claim
30 words
A mechanism for making material for multiple plastic bags with reclosable fasteners constructed in accordance with claim 4 and including an anvil support positioned to extend between said edge portions.
Claim 15
Dependent Claim
30 words
A mechanism for making material for multiple plastic bags constructed in accordance with claim 3 and including slitting means in advance of the sealing heads for separating said edge portions.
Claim 16
Dependent Claim
37 words
A mechanism for making material for multiple plastic bags with reclosable fasteners thereon constructed in accordance with claim 11 wherein said anvil means haS separate upper and lower sections with sound deadening insulating material between said sections.
References Cited (Backward Citations)
US3106941A
Cited
US3202559A
Cited
US3246672A
Cited
US3172443A
Cited
US3226787A
Cited
US3554822A
Cited
US3752718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |