1. A container and cling wrap comprising:
an oblong carton having a lengthwise opening and a lengthwise cutting strip; and
a roll of a continuous thermoplastic food wrap film on a paper core, the continuous thermoplastic film having a width along the lengthwise opening of the carton and a film length perpendicular to the film width, the continuous thermoplastic film comprising a plurality of parallel ribs extending along film length,
wherein the ribs define a pattern of alternating thick and thin regions, the thick regions including a first set of ribs with a first uniform cross-sectional shape and a second set of ribs with a second uniform cross-sectional shape, the first uniform cross-sectional shape differing from the second uniform cross-sectional shape in one or more of width or thickness;
wherein the ribs of the first set of ribs alternate with the ribs of the second set of ribs and are separated by the thin regions
wherein a center of each of the ribs of the first set of ribs and the second set of ribs are aligned with centers of the thin regions such that the first set of ribs and the second set of ribs are present on both a front side and a back side of the continuous thermoplastic film; and wherein the continuous thermoplastic film is dispensed through the lengthwise opening and is cut by the lengthwise cutting strip.
2. The container and cling wrap of claim 1, wherein the ribs of the first and second sets of ribs extend across the entire film width and each rib of the first and second sets of ribs extends along the entire film length.
3. The container and cling wrap of claim 1, wherein the continuous thermoplastic film has a front side and a back side and the ribs of the first and second sets of ribs extend from both the front side and the back side.
4. The container and cling wrap of claim 1, wherein the continuous thermoplastic film has a ratio of machine direction tear to transverse direction tear of greater than 1.0.
5. The container and cling wrap of claim 1, wherein the continuous thermoplastic film has a ratio of machine direction tear to transverse direction tear of greater than 2.0.
6. The container and cling wrap of claim 1, wherein the continuous thermoplastic film comprises linear low density polyethylene.
7. The container and cling wrap of claim 1, wherein the height of the ribs is substantially equal to a starting gage of the continuous thermoplastic film prior to being formed with the ribs.
8. The container and cling wrap of claim 1, wherein ribs of the first set of ribs have a width that is greater than a width of the ribs of the second set of ribs.
9. The container and cling wrap of claim 1, wherein the width of the ribs of the first set of ribs is more than twice the width of the ribs of the second set of ribs.
10. The container and cling wrap of claim 1, wherein the continuous thermoplastic film is incrementally stretched.
11. A container and cling wrap comprising:
an oblong carton having a lengthwise opening and a lengthwise cutting strip; and
a roll of continuous thermoplastic food wrap film on a paper core, the continuous thermoplastic film having a width along the lengthwise opening of the carton and a film length perpendicular to the film width, the continuous thermoplastic film comprising a pattern of a plurality of parallel ribs extending along the film length,
wherein the pattern extends across the entire film width,
wherein the pattern of the plurality of parallel ribs comprises alternating thick and thin regions, the thick regions including a first set of ribs with a first cross-sectional shape and a second set of ribs with a second cross-sectional shape, the first cross-sectional shape differing from the second cross-sectional shape in one or more of width or thickness;
wherein each rib of the first and second sets of ribs extends along along the entire film length; wherein the first set and the second set of ribs are separated by the thin regions; wherein the continuous thermoplastic film has a front side and a back side and the first ribs and second ribs extend from both the front side and back side; and wherein the continuous thermoplastic film is dispensed through the lengthwise opening and is cut by the lengthwise cutting strip.
12. The container and cling wrap of claim 11, wherein ribs of the first set of ribs have a width that is greater than a width of the ribs of the second set of ribs.
13. The container and cling wrap of claim 11, wherein the cutting strip is attached to the front panel.
14. The container and cling wrap of claim 11, wherein the cutting strip is attached to the lid.
15. The container and cling wrap of claim 11, wherein the continuous thermoplastic film has a ratio of machine direction tear to transverse direction tear of greater than 2.0.
16. The container and cling wrap of claim 11, wherein the height of the ribs is substantially equal to a starting gage of the continuous thermoplastic film prior to being formed with the ribs.
17. The container and cling wrap of claim 11, wherein the continuous thermoplastic film is produced by cast film extrusion.
18. The container and cling wrap of claim 11, wherein the continuous thermoplastic film is produced by blown film extrusion.
19. The container and cling wrap of claim 11, wherein the continuous thermoplastic film is incrementally stretched.
20. The container and cling wrap of claim 12, wherein the width of the ribs of the first set of ribs is more than twice the width of the ribs of the second set of ribs.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A method of characterizing frequency response of a device (DUT), the method comprising:
a. receiving a bit sequence comprising repeated base bit pattern, the base bit pattern having a first transition from a first bit voltage, VLB, to a second bit voltage, VHB;
b. determining, using bit error rate distribution, multivalue voltages along the first transition; and
c. converting the transition voltages into frequency domain to characterize frequency response of the DUT.
2. The method recited in claim 1 wherein the base bit pattern includes a series of 0-bits at the first bit voltage followed by a series of 1-bits with one transition between the 0-bit series and the 1-bit series.
3. The method recited in claim 1 wherein the multivalue voltages are determined by constructing a bit error rate (BER) curve at incremental points along the first transition, the BER curve spanning a range of voltages from a low slice voltage to a high slice voltage wherein the low slice voltage is less than the first bit voltage and wherein the high slice voltage is greater than the second bit voltage.
4. The method recited in claim 3 wherein the multivalue voltage at any incremental time along the first transition is a slice voltage at which the BER is at 50 percent.
5. The method recited in claim 3 wherein the multivalue voltage at any incremental time along the first transition is a slice voltage at which absolute value of derivative of the BER curve is greatest.
6. The method recited in claim 1 wherein the multivalue voltages are converted into frequency domain by application of fast Fourier transform (FFT) process to the multivalue voltages.
7. The method recited in claim 1 further comprising the step of normalizing the characterized frequency response.
8. An apparatus for displaying a waveform diagram, the apparatus comprising:
a processor;
storage connected to the processor, the storage including instructions for the processor to
a. receive a bit sequence comprising repeated base bit pattern, the base bit pattern having a first transition from a first bit voltage, VLB, to a second bit voltage, VHB;
b. determine, using bit error rate distribution, multivalue voltages for a predetermined period of time from an initial sampling time, TS0 to a final sampling time, TSM; and
c. convert the multivalue voltages into frequency domain to characterize frequency response of the DUT.
9. The apparatus recited in claim 8 wherein the base bit pattern includes a series of 0-bits at the first bit voltage followed by a series of 1-bits with one transition between the 0-bit series and the 1-bit series.
10. The apparatus recited in claim 8 wherein the storage further comprises instructions for the processor to determine the multivalue voltages by constructing a bit error rate (BER) curve at incremental points along the first transition, the BER curve spanning a range of voltages from a low slice voltage to a high slice voltage wherein the low slice voltage is less than the first bit voltage and wherein the high slice voltage is greater than the second bit voltage.
11. The apparatus recited in claim 10 wherein the multivalue voltage at any incremental time along the first transition is a slice voltage at which the BER is at 50 percent.
12. The apparatus recited in claim 10 wherein the multivalue voltage at any incremental time along the first transition is a slice voltage at which absolute value of derivative of the BER curve is greatest.
13. The apparatus recited in claim 8 wherein the storage further comprises instructions for the processor to convert the multivalue voltages in t o frequency domain by application of fast Fourier transform (FFT) process to the multivalue voltages.
14. The apparatus recited in claim 8 wherein the storage further comprises instructions for the processor to normalize the characterized frequency response.