什(shen)么是(shi)裹背條(tiao)，裹背條(tiao)是(shi)通(tong)過皮殼機等機械用于精(jing)裝書(shu)(shu)本的(de)書(shu)(shu)脊部分，使書(shu)(shu)貼連接得(de)更加牢(lao)固。書(shu)(shu)脊制作弧(hu)長(chang)的(de)計算，本器規格(ge)依書(shu)(shu)芯幅(fu)面大(da)小進行調定，以能(neng)將(jiang)書(shu)(shu)芯平穩地送(song)進夾(jia)書(shu)(shu)裝置內為標準。入本后的(de)書(shu)(shu)冊不(bu)斜歪，四角垂直地頂齊(qi)在夾(jia)書(shu)(shu)裝置的(de)靠板、側規內。裁切尺寸正確一致，其質量要求(qiu)與(yu)規格(ge)誤(wu)差與(yu)一般切書(shu)(shu)相同。

夾(jia)書(shu)簽絲(si)帶(dai)(dai)裝(zhuang)置(zhi)安放在切(qie)書(shu)機(ji)與扒圓起脊(ji)機(ji)之間。即將切(qie)完的(de)書(shu)芯(xin)，用(yong)分(fen)本器從中(zhong)(zhong)間分(fen)開，再由輸放絲(si)帶(dai)(dai)器將絲(si)帶(dai)(dai)夾(jia)入中(zhong)(zhong)心紙書(shu)芯(xin)的(de)中(zhong)(zhong)間靠訂縫一邊。絲(si)帶(dai)(dai)夾(jia)在書(shu)芯(xin)內(nei)兩端(duan)各留出粘邊和使(shi)用(yong)的(de)余地，再經切(qie)刀（剪(jian)刀式）將其剪(jian)斷。

剪斷后(hou)的(de)(de)(de)絲帶，裹(guo)(guo)背(bei)(bei)(bei)條(tiao)芯(xin)部(bu)分(fen)被下(xia)面膠(jiao)輥著膠(jiao)、壓(ya)(ya)實完成夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲帶過程(cheng)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲帶的(de)(de)(de)長度與(yu)一(yi)般(ban)手工(gong)加工(gong)長度基本相同，可依書(shu)(shu)(shu)(shu)(shu)(shu)(shu)冊幅面長度調(diao)定。扒(ba)(ba)圓起脊操(cao)作及要(yao)求。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)經裁切、夾粘絲帶（或(huo)不(bu)夾粘絲帶）后(hou)，繼續傳送（或(huo)翻轉變(bian)位(wei)）并(bing)做(zuo)90°翻轉，使平放書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)變(bian)為后(hou)背(bei)(bei)(bei)朝上(shang)（或(huo)朝下(xia)）而(er)進入扒(ba)(ba)圓起脊機。扒(ba)(ba)圓起脊機的(de)(de)(de)加工(gong)，其操(cao)作分(fen)為兩步，但機器的(de)(de)(de)結(jie)構是連在一(yi)起的(de)(de)(de)，均(jun)是先扒(ba)(ba)圓后(hou)起脊。扒(ba)(ba)圓。扒(ba)(ba)圓起脊機在扒(ba)(ba)圓時，由一(yi)組（或(huo)一(yi)對）圓輥，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)壓(ya)(ya)緊后(hou)作相對旋轉動作），使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)(ba)成適當規格圓勢(shi)，加工(gong)成圓背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)(de)形狀分(fen)為圓背(bei)(bei)(bei)有脊、圓背(bei)(bei)(bei)無脊和方背(bei)(bei)(bei)（或(huo)稱平背(bei)(bei)(bei)）三種。平裝裹(guo)(guo)背(bei)(bei)(bei)條(tiao)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊不(bu)高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)平面，而(er)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊一(yi)般(ban)要(yao)高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)平面。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊分(fen)為真脊和假脊。

真脊(ji)是利用書(shu)(shu)(shu)(shu)背(bei)上下(xia)兩邊變(bian)形(xing)(xing)的弧度高出(chu)書(shu)(shu)(shu)(shu)芯平面；假脊(ji)則是利用紙板鑲在書(shu)(shu)(shu)(shu)背(bei)后形(xing)(xing)成(cheng)的書(shu)(shu)(shu)(shu)脊(ji)，書(shu)(shu)(shu)(shu)脊(ji)的脊(ji)高等于封面紙板的厚度。方(fang)背(bei)書(shu)(shu)(shu)(shu)芯。是指(zhi)書(shu)(shu)(shu)(shu)芯的書(shu)(shu)(shu)(shu)背(bei)平直方(fang)正。書(shu)(shu)(shu)(shu)背(bei)不突出(chu)，與平裝書(shu)(shu)(shu)(shu)刊的書(shu)(shu)(shu)(shu)背(bei)基(ji)本相似。

背(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)上下環襯互成(cheng)直角，由(you)于(yu)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)是用鎖線訂訂連(lian)，每(mei)一個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖的(de)(de)訂口(kou)折縫里面都用線串過，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖其(qi)它部(bu)分要厚一些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)帖數越(yue)多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)其(qi)它部(bu)分厚度的(de)(de)差別也越(yue)大(da)。所以方背(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)形(xing)(xing)式(shi)一般(ban)只(zhi)用于(yu)厚度約(yue)為20mm的(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)有(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)有(you)脊(ji)(ji)(ji)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高起有(you)脊(ji)(ji)(ji)壟，堅硬挺實(shi)，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)的(de)(de)形(xing)(xing)式(shi)適合(he)于(yu)裝(zhuang)訂較厚的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)明顯的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方便。目前我國的(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用這(zhe)種(zhong)圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)有(you)脊(ji)(ji)(ji)的(de)(de)加(jia)工(gong)形(xing)(xing)式(shi)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)假脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)厚度相(xiang)同，堅實(shi)挺括，但沒有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)條(tiao)脊(ji)(ji)(ji)。這(zhe)種(zhong)形(xing)(xing)式(shi)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)，一般(ban)常與(yu)軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或(huo)塑(su)料壓制而成(cheng)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相(xiang)配套。中心(xin)(xin)紙有(you)些機器還沒有(you)沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)置，即將方背(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)加(jia)工(gong)，作初步定(ding)(ding)型。先(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)厚度和中心(xin)(xin)紙幅面大(da)小(xiao)調定(ding)(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)（或(huo)沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)置）的(de)(de)規矩，再(zai)使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并(bing)送(song)到扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)扒(ba)擠成(cheng)一定(ding)(ding)圓(yuan)(yuan)(yuan)(yuan)(yuan)勢(shi)。