Original documents
Every page of the Jetspray papers the family has kept: the patent, the brochures and price list, the shop notes and build guide, photographs, and the suppliers' manuals. 15 documents, 108 pages, each shown beside a transcription.
About the collection
These papers come from the family's records of Jetspray Products, Inc., the San Diego company that built Alex O. Jutila's airless roof-coating machine (U.S. Patent 3,203,631). They range from the 1964 patent filing to letterhead used after 1982.
Each document was scanned to PDF. Every page is shown here as an image, which opens full size when clicked, and the original scans can be downloaded from each document's page.
The transcriptions were made with machine assistance from the page images. They reproduce the original spelling, mark words that could not be read as [illegible] and uncertain readings as [word?], and add short notes describing photographs and drawings. They may contain errors: the scan is always the authority. If you spot a mistake, or know more about a document, please tell the family.
The Patent
The invention as filed with the U.S. Patent Office.
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U.S. Patent 3,203,631
Alex O. Jutila's patent for the machine: two sheets of drawings (Figs. 1–6) and three pages of text.
Sales & Marketing
Brochures, mailers, prices and letters sent to roofers.
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“New! Jetspray” brochure
Cover photograph of a gravel roof being sprayed, a cutaway of the machine, specifications, coatings list and testimonials from two San Diego-area roofing companies. Uses the El Cajon Blvd. address, the company's earliest.
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“Airless Jetspray” brochure and mailer
Two pieces scanned together. Pages 1–2 (tan sheet) carry the later 6308 Riverdale St. address; pages 3–4 (green/yellow mailer) carry the earlier 2223 El Cajon Blvd. address.
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Orange self-mailer
A fold-over mailer addressed to “Mr. Roofer”, with specifications and the one-year guarantee.
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“New 1967 Model” card mailer
Announces the “New 1967 Model” Jetspray and is signed “Alex Jutila, Mgr.”
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Equipment price list
One-page price list for the complete unit and what it included.
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Guarantee letter
A letter extending the guarantee on material and workmanship to 90 days, signed by David Eliason, Sales Manager.
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Company letterhead
Late letterhead with a roofer-silhouette logo. The P.O. Box was the company's last address; the 619 area code dates it after 1982.
Building the Machine
How the machines were built, run and serviced, from the shop floor.
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Shop notes
Fifty pages of handwritten parts lists and step-by-step assembly procedures, written by Bob Ruth, mostly on Winn Supply Co. notepads.
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Polaroid build guide
Twelve notebook pages written by Bob Ruth, each with Polaroid photographs taped on and hand-lettered stickers, covering painting, the agitator, shafts, bearings, leg braces, lid and pump.
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Service and Operating Instructions
The printed operating leaflet with a lettered parts legend and an exploded drawing. Uses the 6308 Riverdale St. address (later than El Cajon Blvd.).
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Shop photographs
Forty-one Polaroids of machines and parts in the shop, three hand-written Polaroid backs, and two older black-and-white snapshots of earlier tank designs.
The Company
Jetspray Products, Inc. in person.
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Trade-show booth
Alex Jutila and his wife at the Jetspray Products booth (no. 437).
Supplier Literature
Manufacturers' papers kept with the Jetspray records.
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Moyno pump manual: L3 Drive End
Robbins & Myers service manual for the Moyno L3 drive-end pump, with handwritten notes on the cover about the engine and rotor lengths.
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Enerpac JHL-1.5 parts sheet
Repair-parts sheet for an Enerpac 1½-ton hydraulic jack. Found among the papers; its connection to Jetspray is unknown.